Going through the 2.0 info I was disapointed in one area. Midi 1.0 was based on piano type instruments. So it seemed logical to use the keys in the interface definition. These day playing surfaces and instruments have evolved. Note on value should in my opinion no longer be defined by key but should specify the frequency. If the Key is kept as basis you still have to fiddle arround with pitch bend to get tuning variations you seek. Integration into eurorack, modular, microtunal, different scales, application to other instruments and varity in tuning would profit from this. So the question is why?