I absolutely hate this too. I came here just to find others who hate it as well... My last group just repeated ad naseum: "just learn the attacks", "get good lol". But to me... It's so lame having an attacks cast finish... then the boss starts his animation and may not swing or explode until at least a solid 2 seconds after. It's so lame feeling.

Like... how hard would it be to make it so the boss starts his animation a second before the cast finishes so the animation and the damage dealt lines up?! WOULD THAT BE SO DIFFICULT?! The animation is all fluff anyway... Why not have it go off 80% through the cast bar? It would also be a great visual indicator of when you need to GTFO out of the orange AoE circle as you can see the boss winding up it's attack... Not... "oop! circle disappeared and I was still inside it! Time to die halfway across the room a few seconds from now!"

So friggin' lame!