Inspire Recklesness is, in my opinion, the worst ability in the game. Bar none. THe nonstacking doublestrike is an issue, to be sure, but the worst part is the -fortification! Anyone who is not a melee, or who already has an equivalent source of doublstrike actually gets DEBUFFED by this song. Infact, for casters, archers, healers and the like, this song represents nothing but pain and potential griefing. And while there is a way to counter this (defensive stance), that method also dispels any rage-type effects too. So inspire recklessness forces nonmelees to either disable other helpful buffs to get rid of it, or live with less fortification and no positive bonus.
If Inspire Recklessness gets changed, it MUST have the fortification debuff removed. Replacing it with some other kind of debuff that only applies to melee characters would be fine (say, a stacking 2% doublestrike per succesful melee hit, and -2% fortification to self, capped at 5 procs, duration 10 seconds..?), but please stay away from the 100% negative towards non-melees aspect that it currently has.