Purge glyph will remain better, I'm hoping they will make GW baseline to take that glyph.
My overall impression is that these are nice changes but aren't enough to make elemental top tier viable. The largest changes being Shamanistic Rage for obvious reasons, EM which is a very nice talent buff which should line up with the new trinket cooldown and the blanket silence nerf making our lockout seem better by comparison. Additional changes will be needed to offset onset of nerfs directed at restoration like the totem silence and likely a tremor nerf in the near future(it needs to be done, I have a few ideas if anyone is interested)
From here elemental needs two things to become top tier viable, passive defenses and a control/utility buff.
For passive defense this could be anything like a reduction like shadow/moonkin form (my suggestion being 2% damage reduction for every stack of lightning shield) or a short cooldown to get ourselves out of bad situations similar to fade talent or safeguard(bad examples, they're obviously too strong but you get the idea)
As for control/utility buff I mean they need one or the other. Elemental needs something to help set up a controlled kill (as opposed to just throwing damage out and hoping for a random burst or your team setting up a kill for you). My suggestion would be to make the stun totem better for elemental, more reliable so it can act as a cooldown stun similar to deep freeze. I would like to be able to drop the totem as an AOE and have it placed exactly in the center of the AOE location(which totemic projection does not do), passively the range will be 5 yards but with totemic projection it would be increased to 40 yards. The charge time should be reduced by 1 second to 4 seconds (2 with glyph) and when the totem is killed it will also detonate.
Alternatively (or maybe additionally?) they should buff elemental utility. In past seasons elemental was used as an anti CC machine for their healers which provided great utility. Over cataclysm and MoP though we lost nearly all of that utility: Inital tremor nerf, grounding totem cooldown, shear cooldown, root nerf and potentially future tremor nerf. Also, our heals are terrible now. No suggestions come to mind at the moment but if you compare our utility to shadowpriests, or even moonkins, rets and other dps its simply terrible.
Don't touch our damage.