I just had an even more interesting idea, but I don't know that they'd do it, or how it'd be balanced...

oGCD Combo paths.

Shinten leading in to a higher damage oGCD (Shinten button would change automatically). I don't think they'd ever do it, but I was just visualizing it and it'd give SAM a more visually interesting rotation to do stabs AND slashes between GCD's. Either way, we do need another kenki spend.