MV
1)It doesn't become... It is in a way audio edit window. Has other purposes, but that is how I use it (even for node editing) as waveform is large enough. I use it because you have access to both: Chord sheet and Waveform at the same time.

2)It is docked. I don't believe you can un-dock it. Unfortunately. I hope that will change one day.

3)2022 feature didn't went away (In theory, it should) but ALT+F8 is NON-modal, so that is a blessing as you can do sooo much without jail box of previous 2022 partial regen. In my opinion all features should be combined and made into one non modal tool.

6) This non-modal partial regeneration tool.

I will leave 4,5 for those who can answer them better.