Will pvp have separate hotbars? If not, how are you planning to change your UI?
I ask because I'm unsure how I am supposed to adapt my hotkeys if there are many new skills. Also, having to swap skills between going pvp and pve will become quite a hassle on a repeated basis.
http://i.imgur.com/Rh6SHWD.jpg
My keys for example, I am already out of easy-to-reach buttons and mouse binds. I think for pvp, because of the cast interruption, you would replace Ruin1 and perhaps Shadow Flare (I don't think there will be many case where a low-potency low-radius aoe will be of use), but the other skill all have situational use.
Would like to hear from others, how you plan to adapt.