Constructive & Helpful!
I really don't get why they blocked off the crit for the auto attack in the first place, at best they could have made it lower the crit chance for it until Enrage is active if not tying it to it outright.
1. They want to skew people towards not using Luck enhancements. Not that this class really changes anything, meta-wise. For most people, it's just a nuisance that you would have to run anything else than Luck or Wiz, or rely on Spiral Carves or other Awe enhancements. You wont get much DPS mileage out of the class anyways, Awe or otherwise.
2. They wanted the class to basically only do 1 thing, being a support. The AoE part of it looks more like an afterthought so the class wouldn't only be usable in a single, pretty specific situation.
The class is significantly slower than most, if not all of those classes ,with or without enrage.
Unless you can bring some hard data on that to definitely prove that FB is a horrible AoE class, there's no reason to believe that. I have used it for a bit now, at various HP intervals and it does perform similarly to Blaze Binder, just with a slightly harder time killing of stranglers with low HP and has no heal unless it decreases it's own damage for a while, making it mostly useful for low/mid HP mobs, in the case of continuous farming on set enemies without resting. It can barely hold against 1 screen of Toweofdoom5, if you loop Enraged constantly, for example. Health Vamp could sort of give the class a semblance of sustain while Enraged, but with the slow auto attack, even hitting 3 enemies at once, the proc rate is still not great. It also needs some specific HP amounts, which is dependent on your Enrage and auto attack
damage to avoid needing to wait ~4 seconds to take down the remaining couple hundred HP of enemies. Versatility is definitely not it's strong point.
It being consistent doesn't give it a free pass and that discussion was already had before, regarding Blaze Binder, but people disregard it's AoE potential too quickly due to the haste debuff + lack of crits, when it still gets the job done at about the same pace as other mid/high tier AoE classes. Maybe my opinion could change once I reach lvl 90 and get proper Awe enhancements again, I have only been using normal enhancements with FB, outside of testing Full Luck FB with Spiral Carve (both Enraged and not enraged) vs Full Fighter, Enraged FB against a single enemy. I doubt the AoE viability would change much with Awe enhancements though.