Maybe I am missing a lot, the piano roll is a great feature but almost unusable at the current state.
We would need:
-A function to scroll within the track
-A velocity tool
-A tool for midi draw
-When changing the length of a not we need to see the not getting longer or shorter.
-At the moment it is impossible to drag a note with the mouse (vertically)
-A cycle/loop function
Generally we need the basic functions that are in a sequencer.
I hope this is on your to do list, but I am pretty sure it is.
Thanks for making this an awesome application!