Its suppoused toand 5 looks like Claymation. In the meantime cell shading has improved so the anime look of the Zero series (and anime movie) could have been recreated polygonally perfectly now, but instead we have banana hair, clay statue stumpy muscle thugs and thick women in fetish outfits.
.
Street Fighter looks like action figures fighting, that's literally the entre point.
Further more, it you could do an arksys " Everything looks anime perfect" they would loose out on their revenue stream, costumes. Because to make shit look that good an anime, they would have to mate every single part individually, because there would be no physics because the graphics are baked in. And while that works for DBZ because its dragonball the fuck Z and for the most part outside of rare occurrences there isn't too much of a market for alt costumes. Its there for every other fighting game and games in general and makes a lot of money. What the hell would they throw that away on a process that would take them a long amount of time, when they could make a fighting game that looks good in its own way in a completely different art style that also allows them to get different revenue streams