Quote Originally Posted by Clair View Post
Is this somehow not a valid issue to the point where people can blindly state PvP is the sole reason casting while moving isn't happening going forward?
That "issue" can be solved by simply making you cancel a cast once you disengage or press the Esc/cancel button once, instead of having to press the same skill again as it is now, which would make things more intuitive, at least from my perspective.

So yes, other than that, his only reason is PvP.