Of course a lot of stuff will be broken, this is an early beta and several characters aren't even finished.
The game so far looks solid on a basic level. With a few easy tweaks on the system they will have a very good game.
First, they should zero horizontal speed when going for a crouch. Added gravity so combos aren't as floaty would improve things a lot. Maybe add a juggle potential system as in old SF games just to be sure.
And finally the gougi buffs should be timed. Keep them silly and overpowered (fun), but make it so once you meet the conditions you have to manually activate the power-up, and have it run out once say, 5-10 seconds have passed. Maybe add the option to do a "gougi cancel" by activating mid-combo for a bar, now that there are no excels.
Those are the major things I would change. I'm confident they will sort things out, they have quite a bit of time to iron things out.