It certainly has been interesting getting used to the current state of enmity in SB as opposed to HW. hopefully the buffs to some enmity actions this patch makes it a little easier on us. But my experience goes:

-Single Target = Fine
-3 mobs = Burst dps yanks hard (RDM/BLM) mainly cause they all pick separate targets.
-5+ mobs = Fine, because your AoE threat can match dps AoE.