Creds: Tournament player, r1, glad as ele in worst seasons ect. w/e
PTR changes look nice, I was content with the ele changes while other casters were receiving nerfs but most of them have been reverted. I'll hold off any survivability suggestions till after real testing on live with sham rage, I don't think there will be too much of a problem though.
My largest concern with elemental is the our very weak control. Our CC, stun and interrupt are all inferior to the other casters, this can be a huge problem in arena because you are very reliant on your team to set up the kills for you.
2 simple and reasonable changes:
Reduce the cooldown for Wind Shear by 2 seconds (elemental/enhance)
Reduce the charge time of Capacitor totem by 1 second (2 seconds with glyph 4 without)
Those small changes can go a long way.