Surecast:- currently useless, never used, if interrupts could be a problem most players will just swiftcast instead.
One small change. allow casters to move during there next spell cast without interruption. would make that ability much more usefull. would be usefull for things like flares and raises with there long spell casts when swift is on cooldown.
Problem with this is, you use Surecast and begin casting a very long spell, like Stoneskin II, or Raise, but then shit hits the fan and you need to cancel the ability to cast a Cure II because the other healer died -- but crap, you can't interrupt it by running because you just used Surecast, now you are committed to finishing the cast which could be very dangerous.