Here's one that would be very useful to avoid duplicate midi mappings: add a "global midi channel" setting, and then add a "global" entry to the selection of 1-16/any on each mapping.

Rationale: i'm trying to layer two instances of pianoteq, and have each respond to certain controls on a different midi channel - to do this, i have to duplicate my midi mapping, and change the channel number on all the mappings that i want unique to each instance. It would be a lot nicer to be able to switch between channels with one setting, without having duplicates of the midi mapping setup.