I've gotten a chance to go hands-on with some MTNU sets, and I have found myself impressed with the ones I've tried. I liked the centered legends and they felt very comfortable to type on. I like SA and MT3, they get tiring to type on for extended periods.
I wouldn't mind seeing either A) New MTNU sets from Omnitype or B) MTNU versions of existing sets like Redline or 8008.