Infuriate is coded a bit weird most likely. When I play warrior it is definitely not in the designers intent to have the Inner Chaos get locked out during the charge window. That is to say, Inner Chaos shouldn't eat a charge from Infuriate. Same with Chaotic Cyclone.

That's one thing that DRK has a bit better with Delirium since they can choose to use other abilities without consuming charges. Also Dark Mind feels really out of place now in this game since there are points where it is hard to tell if something is doing physical damage or magic damage without looking at the combat log. if an enemy is throwing fire than it definitely is doing magic damage, but when something is hitting the player with an energy looking attack and it turns out to by physical that is always a surprise.