The proc coefficient nerf for ET doesn't directly effect me - I simply don't have the right gear to attempt a CM build. So, we'll have to see what happens.
The buff to Hydras is gravy. I was already using Arcane Hydra over Venom... just a playstyle thing, I guess. But I'll have to re-evaluate them all.
Maybe there will be lots of new alternatives for the undergeared besides Blizz/Hydra, but it's a build that I grew into organically and enjoy, even if it turned out to be an overused cookie-cutter spec.