A lot of things have happened to him in that span of time, tho. HoM, losing a bunch of friends, losing his hands, etc... He has anger issues but he's a lot more humble too (when being written well anyway).
Hellion wants to turn the X-Men into No Girls Allowed, now?
Broo is practically one of the creatures from Alien. A parasitic bug that lays eggs in its victims, burrowing inside the host, destroying everything that they were and leaving a new Brood in their place. The fact that he wears glasses doesn't change that.
He's promised not to and yet they kept him around when he got brain damaged and became a feral monster that attacked everything in sight. And even after he got fixed by Nightcrawler's holy ghost he's still hunting down live animals and eating them raw and he's keeping those little night time activities a secret.
Broo and his kind could easily infect every single mutant at that school, wearing their husks as prom dresses. I think it's ridiculous that more students aren't more distrustful or afraid of him.
I need more "Bromo-Superior" ASAP
Captain, in Order to build a better world, sometimes means tearing the old one down... And that makes enemies.