Blizzard was being coy about who was responsible. So while you had a fair amount of people maintaining that it was Sylvanas based on the picture, even more had others theories like the night elves doing it, albeit after evacuating everyone, to deny the Horde the island or one that I, and plenty of other people picked, thought that it was Queen Azshara seeking to keep the faction war going as apart of N’Zoth’s plans.
Suffice to say, there was alot more outrage over “I knew it” or “I told you so” when it was revealed that it was Sylvanas gave the order because after Legion, there was alot of trust towards Blizzard and the coyness about it all just felt really asinine.
It actually didn’t strike me as odd. I took that moment as Saurfang himself basically saying that he will no longer blindly and loyally serve Warchiefs, of which he’s served both good and bad, but act by his own sense of honor. And while he did initially seek an honorable end, he also discarded that and got his revolution going to save the Horde before realizing that his death* could be the best way in which prevent the Horde from spilling Horde blood.
*He genuinely didn’t believe would survive the Mak’gora against Sylvanas but preserved forward as he couldn’t bring himself to have the Horde fight one another.
Now when it comes to giving one’s life for Saurfang’s concept of honor and loyally dying under Sylvanas, there actually is alot more nuanced involved. For one honor is subjective based on someone in question either because they follow a cultural honor or have their own code of honor. Case in point Nazgrim’s honor in Mists compelled him to stand with the Warchief till the end, where as Thrall’s personal honor saw him stand against Sylvanas and side with Saurfang.
So while honor can be viewed as loyalty, it can also be seen as a choice of the individual in question. On the flip side loyalty itself can be seen as a honor or in the die hard cases, demonstrated by the True Horde for example, as zealotry.
In the end, it really depends on the person and how they perceived honor, loyalty, and the difference between the two.
That’s doubtful, the Sylvanas novel heavily implies that he is acting out of jealousy against Sylvanas. The moment the coup starts, Varimathras is all “I shall be the one to herald the master’s victory, not you!” and Sylvanas is so confused but more focused on getting out of the UC.
It really disappointed me that when she meets Mal’Ganis, she didn’t bring this up to him. After all since there was a moment where Sylvanas was helped by a random Forsaken woman, prior to Varimathras and Putress trying to kill her, that easily could have been revealed to be another nathrezim. Thus Sylvanas, who did become aware that Zovaal had his eyes on her prior when they met in person, could have seen that as a sign that “Hey Zovaal was looking out for me, he does genuinely want and value me as a partner.”