How does Must Style function? You can only deal damage while your combat rank is S or higher? If so, it might be doable to create it as a mod. Although, I dunno if it would have the side effect of making scores much higher for levels.
Yeah, that's basically it. You do zero damage until S and then you need to get to SSS to do full damage. With how DMC4's scoring is performed, it would probably result in an enormous artificial Style ranking boost for scoring, but I don't think it matters much since it caps at S?
And the graphics are still worse than the PS2 version. And it still has the odd glitch here and there. But it is playable now. Man what an awful port.
It actually looks way cleaner than the PS2 version, though. I'm not justifying the laziness and sloppiness of the port, but it looks pretty nice if you can get it working.