As far as I can see, the only way to achieve legato notes with midi/plugins right now is to have two lanes and manually do overlapping notes.
It would be much smoother if there was a legato command that could work with midi notes. I guess it would just delay the note-off of the current playing note note until the note-on of the subsequent note has been sent.
Thanks for sharing the link. That protoplug script looks like a decent workaround for now!! I do hope the developers consider implementing this though. I’ve implemented it in a hardware midi sequencer and it was not a lot of work.