I haven't had much of a chance to Multibox with a 'lock yet, but not having to worry about clipping DOTs make me all warm and fuzzy.

My main from launch was warlock so I've been through "pet class, but not as good as hunters" phase, the "Fear Bombing" phase, the "faceroll shadowbolt" phase. WotLK had lots of good ideas, but the rotation was generally a PITA.