well , he is not that insane of a character all around. I mean , he is good vs undead or unarmored stuff. He's also really good with a dancer. Hell , he can work really well as a substitute aw archer (most likely bashira) or the G tier map for on DC farming , without actually being awakened. (You still need spica tho)
But honestly , what i really want in him is his SAW. He does a huge amount of damage with it. Just imagine it boosted by a max skill level aw uzume and a dancer.
Guess at that point it's overkill anyway , and i honestly don't see many maps wehre you would require THAT much damage, but i just think its cool. Untill then , vincent will stay on the bench for me. But i really want to skill awaken him sometime
edit : @tenhou