Wait, so rage now only lasts for the turn you use it on? If so, yeah, that's brutal, especially with 2 AP. So you basically guarantee one attack gets a crit (ideally a whirlwind), maybe two or three if you flesh sac and haste and warlord/glass cannon.
Probably it's still quite good if you can get off a whirlwind, crippling blow, and bull rush, all hitting 3+ enemies. But that requires specifically building a character and setting up towards that combo, even moreso than before. And other than that combo, its a pretty meh skill. Barring dropping it from +100% crit chance, I think it might be the best solution to greatly limit it and make it fairly build dependent. I haven't played with the new rage though so I can't really say how it plays now.