As has been noted, at first glance it seems that the highest tiers of the new tree are aimed mostly at increasing PvP viability of elementals. However, Thunder fits in nicely with the "Give Hybrids more AoE abilities" trend, which most likely is Blizzard's way of addressing the 10/25 man raids - they still can design encounters that rely on AoE without having to assume that you have a given number of warlocks or mages in the raid. It doesn't mean that hybrids can replace those classes completely, but moonkins, shadow priests and elementals will be able to support a mage or a lock substantially.
That doesn't change the fact that it isn't a killer PvE talent, of course, and will probably see much more use in PvP.
As for Totem of Wrath not cutting it, don't forget that most classes that had +10% to hit from spells got those talents reduced to +3%, so ToW will be a lot more attractive to them now.
Oh, and Hibernate has always been usable on Dragonkin
