5a proration is one of Tsubaki's notable good points.
Damage is very good on some things, damage is pretty bad on others, I think. 6A, for example, you can do pretty good with if you use mugen, but otherwise, you're not looking at that much damage. Don't care much really tho. 22d is still awesome. Corner throws are pretty great.. Actually corner damage is pretty damn good off a lot of stuff.