My only feature requests that remain are some sort of Real Time Erase functionality, and I really do wish the Scale Mode had a root note select feature. I find myself never using the Scale Mode because it's kind of pointless once you start recording tracks, and then want to do stuff in Scale Mode. It would also make transposition in Performance Mode supercharged, like a NDLR-lite.
Also: Is there a way to convert a Song into a Part? I mean somewhere down the line I'll probably get another RK-008, but it would be nice to make songs, and have all those mutes etc, and then convert them down to a Part, and do some more microscopic editing in the Step Editor. Maybe this could be a memory limitation though.