Two fairly minor UI enhancements I’d like to see (minor in terms of impact/usability, I’m sure implementing is difficult):
Dockable sequencer window. That way, I can keep everything on one screen, albeit with a smaller image window. I know I can close the sequencer window (and I do this often).
Resizable sequencer window. Specifically the target list, when going after many targets, can be a bit small to navigate. Also, for events within the target: if adding more than 5 events (say, 6 or 7) I’d probably just prefer a larger (taller) sequencer window than scrolling, or potentially shorter if only 2 or 3 events.