You can have VCM Rotary (from the YC61 series) but only for Part 1. So always put your tonewheels in Part 1 or you'd need to use a non VCM Rotary effect.

Tempo is a destination. That's cool. No dedicated knob but an assignable source is a close second (or better).

The 5 or 3 segment ribbon makes more sense now. It's not multi touch. It's for low-res stuff where you only want high/med/low or highest/higher/med/lower/lowest. Montage classic can do the same sort of thing with user curves (step). Haven't reviewed what these offer more than simplification of achieving this.

Reversed sliders is cool for a more traditional tonewheel experience. 9 sliders would have been nice too but I think we'll manage.

128 elements max per part means Montage M doesn't need multi Part sounds in many instances. This is a big deal since it simplifies slider volume control and conceptualization. It's mud that was previously thrown by Roland users who didn't have to mess with multi-Part sounds. Now there's less of a compromise that would need to be made to fit playable Parts in a Performance or edit tracks in a DAW controlling different sounds.

Assignable MIDI receive (or, rather transmit and receive set to the same arbitrary channel) per Part is huge. Layers can use the same MIDI channel and reduce optimize the MIDI traffic as well as have less of a demand on external controller zone counts. Overall - even sticking with MIDI 1.0 - there's more MIDI flexibility this time around.

The Sequencer doesn't look to have full event editing where you can select a single event and modify what it is and what the parameters are. It looks largely lifted from Montage classic. Maybe there's something new - I just didn't detect it in my skim.

User arpeggios do not seem to have more features. What I mean is you (still) can't add some of the advanced arpeggio features to user arpeggios. Preset arps still have more they can do than one can create from scratch.