Rene’s width, and the difficulty I had with Pressure Points touchplates, is why I have a Mimetic Digitalis. It doesn’t have the hands-on immediacy of Rene, or different paths or rests/skips, but it does have 4 CV channels, zero and randomization buttons, a push encoder that can do semitones so you don’t need to quantize, and 16 save slots in 10HP.
Even smaller: I just got a uO_C yesterday and installed Hemisphere Suite. There’s a cartesian sequencer called Carpeggio in it which has some preset chords and scales, which is a nice touch, and you can run two of them side by side. Other than the presets it’s not as friendly as MD, though. I don’t think cartesian sequencers are going to get any smaller than 4HP