Everybody knows it, edting MIDI and garnishing a melody with different ornaments like grace notes or other individual ornaments many stuff could repeat at different positions, it would be nice to have an ornament selection&hotkeys for them. You can save short MIDI ornaments and they are added where you create a note on this pitch with another key than the left mouse button.
There could be an ornament selection for fast access pressing a predefined key or you have a single ornament on a hotkey to add it instantly.
This could save so much, especially if you want to try something in the editing process.
Beside an ornament selection another tab of the right window to drag&drop also whole sequences inside an event would be nice.