I've finally come to a conclusive decision on what about the game bugs me. The problem is, it looks like the casting animation has a set speed, and there's no animation for spell knockback. Hence, when I cast "Brain Blaster" on my shaman, the spell animation completes, and the little green spitball flies at the enemy, but you still have to wait for your casting bar to complete or the damage isn't done. That's a major flaw imo, even though it's mostly cosmetic.