They can always adjust some things accordingly for classes.
To me as a healer, it's awful. I'll have to debuff, which the cast speed for that is way shorter than the global cool down. Then I'll have to wait to be able to heal whoever when they need healing asap. Or if I need to cast regan on someone and cure on another. Meh, I've never played a game with a global cool down. Don't really see the point in one.
