Adrian, it's a good idea.
Also worth remembering as a wider view, that Midi is past it's use by date in its current form, and i would hazard quite limiting for developers such as the VSL team.
Maybe a 'Midi mk3' would give the opportunity to further expand the capabilities of instruments like the VI in regards to keyswitching, for an example, having 128 midi channels, instead of 16, and 1028 instrument/articulations instead of 127. Instead of going into the Matrix and then selecting a series of patches for keyswitching, one could simply dial in the channel for an articulation.
(If i were to have a say in the construction of a new midi format, i'd go much bigger than this with 500 midi channels, and 5000 instruments/articulations, but i don't know if this would even be possible, and i'm certainly no expert.)
I don't know if any work is being done in this direction, but it seems ever more apparent to me that midi, as it is constructed now, is fast becoming the 'slow' point in a audio/midi compositional work process.
Just two and a half roubles worth,
Regards,
Alex.