Would be so nice to have this feature added that Reaper has - allowing custom note names displayed right on the piano keys. Simply assign a shortcut, select a piano key, hit shortcut, name the note.  This naming map gets saved just for that midi track. This is so convenient with modern sample libraries that have zillions of articulation switches.   Another awesome feature would be allowing to have envelopes in the midi controller lanes. I know you can assign envelopes for MIDI  in the