As a Linnstrument player, I actually feel that the biggest thing missing in u-he synths is actually velocity curve control. The way that u-he synths implement note per channel is in many ways better than many other 'mpe synths', and no doubt sound fantastic.
Unfortunately though, MPE controllers seem to respond much better to a linear velocity curve, which is currently only available in zebra AFAIK. In many ways, Zebra 'feels' more expressive to play than the other u-he synths, despite not having note per channel or MPE support (as a mono synth obviously, or with PB disabled). I tend to avoid velocity sensitivity in the other u-he synths because of this, and just use aftertouch.
To me, this is more important than features such as CC74. The whole point of MPE is having connection with the instrument, and velocity is the most basic type of musical expression. Got to have it feeling natural
Please add a velocity curve control, or even just a linear curve switch.
Other features that would be of great benefit to MPE players would be the ability to control sustain with AT, and release with release velocity. But that's a whole other thing, haha. Velocity curves are more important
More mod mappers in repro, and even mod mappers in a future version of diva, would be great for MPE players!
PS, thanks for your cool synths!