DD was lowered, as was the recharge time (40s/20s iirc). Not sure if thats a blessing or a curse. It does lower the alpha, but then, it can be used more often... Guess I'd rather keep the old dd & recharge, too.
Back on topic: Yes, Mongo Rage needs to be nerfed. The arguement that low-AR professions can use it to land their perks on evade/aad profs lost a lot of its weight if said perks are moved towards NR (and aad is not counting for those perks def) and/or lowered def checks on regular non-NR-based perks.
All that is left now are those professions that already have decent/high-AR. 1500aao is far more than what those need to perk most evade profs. And excuse me for saying so, but someone running *Stance + DoF + Limber + has a defensive setup *should* have a chance of not getting perked or hit in a ridiculous amount.
Imo, either nerf the aao amount or add additional nerfs after using it. In any case, this perk needs serious revisitation.