Another vote for something to support medleys. I agree that adding pauses everywhere except for medley transitions would be undesirable, so some kind of 'Play Through' at the set list level would be fantastic. Preferably it would behave as if I clicked on the next song manually once the previous song ended and the next song is queued (for me, that means after the automatic first selection).
Moreover, it would be good if adding a Play Through to the setlist would allow the next song name to peek through in the next song field (as opposed to the Play Through item), so you'll know what's up next.
(I've tried creating medley versions of songs with joined backing tracks and automation events, but it's a significant maintenance headache so I abandoned that approach, and also like Neil00 just went back to quick manual clicks for medley songs.)