I noticed three "big" changes.
#1. Riptide is being put on PTR. Ripetide (Rank 4... assuming level 80) Instant Cast. 6s Cooldown. 18% Base mana. Heals a friendly target for 764 to 826 and another 795 over 15s. Your next Chain Heal cast on that primary target within 15s will consume the healing over time effect and increase the amount of the Chain Heal by 25%. Basically this is what had been told to us by the dev's. We'll see if it sucks or not.
#2. Earthliving HoT Change. This one is a biggie IMHO. Blessing of the Eternals 2/2 is Increase the Critical Effect chance of your spells by 4%, and increase the chance to apply the earthliving heal over time effect by 80% when they are at or under 35% total health. Earthliving already has a 20% chance... meaning we're at 100%! Not only is it a guaranteed hot for low health people PROC'd from our heals... but that also means it won't just be flying around on people with 100% health overhealing (except for the random 20% procs anyways... but who cares now).
#3. Flame Shock Range Increase. Lava Flows 3/3. Increase the range of your Flame Shock by 15 yards (5 yards each point) and increase the critical strike damage bonus of your lava burst by 24% (8% each point). This means RANGE-WISE, lava burst-flame shock-lightning bolt rotation is at least possible. Damage-wise, I don't know... but at least it has theoretical possibilities now.
That's all I've noticed at the moment. I didn't see any changes to enhancement. :X I may have missed them though. MMO-Champsions has the new trees up from PTR for those interested.