If I play scholar, i usually spam adlo on spellcasters(in case i have time 2 do that) so they do not get interrupted or with whm i spam stoneskin on them. Problem with that wow interrupt system is that ppl can cheat and use third party programs. I think that current system works very well. If casters need some kind of buff, buff surecast and let us have 10 sec time even if we get interrupted.