For a while now, I've been advocating that Ryu get his ceiling climb ability from NG3 and his crawl ability from Master System NG. I'm still fiercely devoted to the first one, but lately I've been wondering if the second one is worthwhile -- it wasn't in any NES games, after all, and the other characters have been increasingly faithful to their NES games lately. However, I recently got a better idea: Give Ryu some sort of cheat that gives him "Master System bonuses" (needs a better name) that functions like the Classic Samus and Classic Simon cheats. Samus crouching and Simon having air control aren't faithful to their NES games, but they improve their playability, and having the option to turn them off makes me feel better about them. This would be the same idea: turning on the cheat would let Ryu crawl and use his sword on ceilings (another MS NG ability), while turning it off would keep him NES-faithful.