I've cleared all Heroics with my warrior apart from Suckulus (bascially I just loath that instance) and I don't find him very micromangement intensive. I am not using any castsequence macros either just use the ability which either comes up, is available or is the best for the current situation.
And holding aggro isn't a problem either even on multiple mobs. The only instance where my pally def. made things easier is the Brann event apart from that he just tanks as good as any other class even from a multiboxing perspective (that's what I think anyway).