I’m glad you mentioned that, I’ve been wanting to address this misconception for quite a while now.
Misconception: “Intervention of the Scythe” 
What is the misconception?
The use of the Scythe of Elune is a common held misconception when it comes to worgen lore. In the Gilneas starting experience, the kaldorei claim that you must steal the scythe, so that they can use it to cure you. This never happens, and there is no cure. This is specifically stated in Curse of the Worgen.
What is the truth?
The Blood Feud
In fact, it is a lie. Belysra Starbreeze and the kaldorei in Gilneas did not want the Scythe to make a cure… they wanted it to put Alpha Prime - the leader behind the worgen attack - back in his exile in the Emerald Dream. Meanwhile the Wolf Cult - the worgen attacking Gilneas - wished to use the Scythe to free their brothers still trapped in the dream. This was the true purpose of you stealing the Scythe of Elune. The Scythe was never used to “bring balance to the worgen mind”, or “unbind that which was not meant to be bound”.
The Ritual of Balance
Many believe that the Scythe of Elune then resulted in the “cure”, being the waters of Tal’doren. This is false, as the scenes of the starter zone are explained in further detail in Curse of the Worgen, and the ritual itself is explained in greater detail in Wolfheart. In fact, the Ritual of Balance is a series of three visions, meant to help you move on from your past. It has nothing to do with the Scythe of Elune. It is performed in the starter zone, and the Scythe is nowhere to be seen. It is performed in the Curse of the Worgen comic when the Scythe is not even in their possession. It is performed again in Wolfheart, and again the Scythe is not present.
The Ritual of Balance is not a cure, it is only helpful (Belysra, CotW 5). It is also not needed for all worgen, such as Genn, the Bloodfang, the Bloodmoon, and others that are capable of shapeshifting before the ritual (CotW 1, CotW 2). In fact, it is also shown to have a chance at being harmful. Genn Greymane reveals that the Ritual of Balance has a chance of turning worgen to the mindless state, and he himself has had to put men down who have failed the ritual (Wolfheart, Ch22).
The Cure
While the Scythe was not used to help Gilnean worgen in Cataclysm, it was used to help Kaldorei-worgen in Legion last year. When wielding the Scythe of Elune, the Balance Druid Adventurer can find four different “Feral Worgen” NPCs in Val’sharah. Using the Scythe, they can remove the worgen curse, turning them back into an elf. The elves will thank the druid, and say they no longer feel the rage, confirming that the curse has been removed from them entirely. After all, the Scythe is the origin and source of the worgen curse, and can also mean its end, in the “right” hands. This is the development the Cenarion Circle wished to find, and had finally done so.
Unfortunately - or perhaps fortunately - this did not last long. Soon after, the Legion invasion escalated, resulting in the dark titan himself plunging his fel sword into Azeroth. The artifacts collected were all used to sap and neutralize the fel energy from the sword, ultimately corrupting each of the relics and rendering them loaded with vast amounts of fel energy. This is the last we have seen of the Scythe of Elune. It is presumably still in the care of the Cenarion Circle, but has not been used, and is likely rendered useless.
Sources
Curse of the Worgen
There is no cure -
https://i.imgur.com/YpVB5go.jpg
Scythe to summon -https://i.imgur.com/ZGUSkFI.jpg
Scythe to banish -https://i.imgur.com/cfv22wm.jpg
Ceremony before the Scythe -https://i.imgur.com/QYV1YTD.jpgWolfheart pg 319
The worgen laughed sadly. “Trust me from experience. That might be simpler. We lost several before we were shown the correct ritual by the night elf Belysra Starbreeze. They were consumed by the curse, became beasts without hearts, without souls.” Genn looked off into his memories. “We had to put them down. The ritual is still fraught with danger. Now and then, there are those who do not survive it.” Varian was not dissuaded. “Better I die trying than to keep on like I am, Genn. I’ve lost my wife and now my son. Anduin may be gone forever and it’s because of me. . . .”
Knaak, Richard A… World of Warcraft: Wolfheart (p. 319). Gallery Books. Kindle Edition.
Wolfheart pg 320
His brow furrowed in deep thought. “We can guide you into the ritual, but how you come through it depends much upon you. To conquer yourself— your own worst foe— requires tranquility, balance, and, last and by no means easy, ultimate mastery of your fury. Three struggles, not one.” “Three or a hundred, I’ll face what needs to be faced. Show me, Genn.” The worgen nodded. “May your ability be as great as your determination.” Genn did not lead him among the other Gilneans, but rather skirted to the south and then east. However, as they walked, several other worgen left their tasks and began following. “Why are they following?” “The ritual needs to be overseen by more than just one.”
Knaak, Richard A… World of Warcraft: Wolfheart (p. 320). Gallery Books. Kindle Edition.
Wolfheart pg 321-322
“This is where we’ve made do since our arrival,” Genn explained. The clearing itself appeared unremarkable save for three simple wells sunk on the opposite side from where they had entered. The fact that those wells were here signified to Varian that they had some importance to what was to take place. That was verified a moment later by the sudden emergence from the woods behind the wells of three druids. At first, Varian expected Malfurion to step out as well, but only the trio— two males and a female— moved toward the wells and the worgen. He did not recognize any of them other than as night elves. They wore solemn expressions and eyed the worgen as if looking for something. “Who is it to be?” the middle one— his blue hair bound in two long braids trailing nearly to his waist and a smaller one thrusting upward from the back of his head— asked of Genn. The Gilnean ruler indicated his counterpart. “This one, Lyros Swiftwind. I give you Varian Wrynn.” The druids looked startled. Lyros muttered, “But he is no worgen.” “Yet, still he suffers as we did before attaining balance,” Genn explained. “The fury within him is no less than that of any of us, possibly even more.” “Please step forward,” the female requested. Varian obeyed. The three druids each placed a hand on the king’s shoulders, then closed their eyes. They studied the lord of Stormwind so for a moment before opening their eyes and withdrawing their hands. Lyros looked at his companions, who nodded to the monarchs. “We see it now,” he said to Varian. “Welcome, Varian Wrynn. We are honored with your presence and, as keepers of these wells, will do what we can for you . . . though I think it best that Genn Greymane be your guide for this.” “I’d prefer that,” Varian replied. “I’ll be glad to,” Genn added. The other male druid— his short, narrow beard and closer-cut hair both green— extended his palm. In it Varian saw a single long, silvery leaf that tapered at the point. “Take this. Eat it. It is a moonleaf, a symbol of both nature and the Mother Moon. It will help prepare your mind for the ritual.” Varian took it without question. He expected the leaf to be bitter, but instead it had a soft, soothing texture and proved easy to swallow once chewed. “Now you must drink from each of the wells.” With Genn beside him, Varian followed the druids to the first of the three wells. Here, the second of the two males took over once more.
Knaak, Richard A… World of Warcraft: Wolfheart (pp. 321-322). Gallery Books. Kindle Edition.
World of Warcraft: Cataclysm
“Today our ceremony will restore balance to your people.” The Ceremony will, not the Scythe
https://wow.gamepedia.com/Preparations“Let the Scythe unbind that which was not meant to be bound!” says Talran the Wild, during a single part in the middle of the ritual. Yet the Scythe is nowhere to be seen.
https://wow.gamepedia.com/Neither_Human_Nor_Beast
https://gamepedia.cursecdn.com/wowpedia/9/99/Well_of_Tranquility_active.jpg?version=06280d778ea2ada1b8e6cd60fbfa7ef5World of Warcraft: Legion
Scythe is used to remove the curse entirely.
https://wow.gamepedia.com/Feral_Worgen_(Val%27sharah)The Scythe is used to store fel energy
https://wow.gamepedia.com/The_Power_in_Our_Hands
Thankyou for the opportunity to explain this in detail Drahli! I’ll be able to add this to the list of questions, and can be referenced when the question comes up again. Do let me know if you have any other questions about worgen, and here’s your thankyou bacon in the meantime. 
