I think you are all looking at this from the wrong angle. Im sure that with the change to interrupts, balance would need to be changed as well to bring things more in line with how they should be. My main problem is with the obvious disadvantage casters have in a PvP scenario.

Change it to pushback, make the needed balances (which is something that will be an ongoing process until this game dies, trust me), and carry on from there. Its a better system, hands down.