Anyway, IMO, the only knk characters other then ryougi that have any actual right to be in mb are Touko and Araya, just because those are the only other characters that actually kept the plot in motion. Asagami/Fujino/Lio/Godsword/Enjou/Alba were all being influenced and used by Araya in some way or another, as he used them all as "Sacrifices" for Ryougi. As for movesets, theyd all be damn near impossible in mb other then lio and azaka. Azaka is already "in" though, and we dont need ANOTHER knife user, even if Lio actually DOES have potential for a unique moveset with his feral-movements and lol-canibalism. IMO, use that feral-moveset for a new DAA, or TATARI Makihisa or something. (Kokuto can be argued to be the most influential character in the knk storyline, but as stated earlier, having ANOTHER tohno look-alike is fucking retarded.)
Never forget that MB is supposed to be centered around Tsukihime. KnK characters are all fine and good, but there more like fun-extra's. Unless they have some sort of relevance to the tsuki-plot, there's not much reason for them to be there. (there's still the whole Touko vs Aoko scenario going on, and lol eyes vs eyes for ryougi and tohno, and Araya can easily end up ryougi's TATARI fear thingie. Ryougi never feared any of the other villains. Not even Lio IIRC.)
Im prolly the minority with that view, but i still dont see why characters like Lio and Asagami should get in before characters like Kiri, Arihiko, SHIKI, etc.