^^^ in response to above questions:
Jack's M1+M2 is a parry that teleports you to the owner of the projectile that you parried. Costs some rage meter. You can press Q to activate rage at any point, but right now all it does is increase the damage you do with all your attacks. You can press Q at any point to turn it off too. However, it drains your rage meter pretty quickly, so I recommend saving it for parries. I'm still tweaking the design of it, because right now it's just a gimped devil trigger. Ideally, I want it to function more like K-Groove from Capcom Vs SNK 2.
Honda and Dhalsim's super meter don't do anything yet. But they will soon...