I see tempo track as an automation lane already now - but more cumbersome to alter.
A TRIM thingy would be really useful TRIM TEMPO kind of that you freeze into tempo track later.
When doing video the first thing I do is play scenes and try to sense the feel of tempo with just metronome for that scene, and make tempo track going through it all.
If then wanting to fine adjust would be swell - as the feel change with music in place as well.
A coarse and fine adjustment knob or something - and working like trim automation.
A feature to do tempo adjustments and Time Warp together and many things is on my wishlist. It’s the most cumbersome part right now.