Only thing I really disliked about the MI series was how mash friendly it was compared to 2D KOF's, although maybe that has some sort of appeal to newcomers like other 3D fighting games tend to have. MI had a pretty fluid combo system, but some of the stuff it allowed like the wall combo's and OTG's was nuts... Kim's Hishoukyaku could OTG and he could SC off it, crazy lol. Then there was like a Rising Tackle semi-infinite off the wall with Terry+Rock I believe. There was alot of crazy shit in the game, but I think it was probably one of the better hybrid fighters out there that used elements of 2D fighters with 3D fighter gameplay. If it was just polished more, it could of been really good.
Some more KOF mainstays would of been good too, Joe, King, Benimaru, Yamazaki, maybe a few other classics or recent Ash Saga characters like Shen Woo, and Vanessa would of been good too.
Also for once Billy Kane was capable of RIDICULOUS combo's. Love it.
And honestly, I don't think the game was that bad graphically either, about slightly better than DOA2:Hardcore, which was a pretty nice looking game in its own time. But I think if they could amp the visuals up to Tekken levels, it would be really good, give it a slightly more realistic art style to it. Stages could of been better too I think, too many stages felt or looked boxed in, and lacked that classic SNK appeal, or were totally empty/barren, lacking in details and animation.