6.11% hit and 24 exp should be just barely above the hit cap and expertise soft cap (for dodge) for heroic dungeons iirc.
I finally leveled my warrior and have been reforging to mastery/parry, so I'm only at about 3.5% hit and 8 expertise. Yes, I do have some aggro issues (mainly against ret palies, oddly enough, I haven't really had problems against any other class so far), but smart use of cooldowns, abilities, shield block, taunt and BnT (for AoE bulls) have allowed me to manage just fine, but it's far from the mouth-breathingly easy that it was in WotLK.
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