As Elemental we are in an identity crisis, again, sadly. The tree really needs to be fixed as the community sends mixed messages. The reality is this, some people LOVE LIGHTNING, some people LOVE LAVA BURST, and some people LOVE ICEFURY/Legion playstyles. In my opinion, blizzard needs to understand that and design the tree so we can have those playstyles to suit the one we prefer, individually. They are part way there but not all the way.
For Instance, make echo baseline and move Control Lava from PvP Talents and put it in its place. The problem with Control Lava is that it removes mobility to an already immobile spec, so no one uses it. Its a dead PvP talent. But they could if, instead of it replacing Lava Surge, it replaced Echo of the Elements. This way you could have really big Lava Bursts, but only 1, or just large Lava Bursts but have 2.
Next, to keep with the fire theme, add in Spiritwalkers grace built into Ascendance. So when you pop it, you have the mobility that is needed in PvP and PvE. Thats why it falls behind and not many use it. Although, there are plenty that would like to, and plenty that rerolled because they feel they cant that would jump back to ELE in a heart beat. Casting Lava Burst on the move very cool.
Then finally, the dead talent that is Unlimited Power. Its dead because its on the wrong tier. Just like Master of the Elements was in 8.0. To fix this, switch IceFury and Unlimited Power in the talent tree. Simple. Now you got a choice between SoP, Unlimited Power, and PE. More over it makes it more feasible and actually gives us and identity by doing this. Your last talent row would be, IceFury (legion playstyle), Stormkeeper (Lightning playstyle), and Ascendance w/ casting while moving (Lava Burst playstyle).
If this happened you would see so many different type of ELE’s out there (assuming balance) and everyone would be happy. You want to play Lightning style, do it. You want Lava style, do it.
They want to talk about class Identity, well there it is. Thats how you build class identity through talents, through playstyle.
Just my opinion, I could be wrong… but not likely.