First, a note of thanks for the many improvements in interface consistency over MJ8. I took the time to complain about them then, I can take the time to express thanks for their resolution now
nits:
In Library Tools > Move / Copy Fields... maybe "swap" would be more descriptive than "flip-flop"?
When adding or editing a View Scheme, the Search Criteria input does not respond to the Shift+Insert paste method (but does accept Ctrl+V). Every other MC input field that I've tried accepts Shift+Insert. I mention this because I'm left-handed and the old DOS-style shortcuts are a real help to me.
I think the Commands and Tools buttons should be at the top of the File Info window, nearest to the data that is editable and more like "regular" menus. I understand if you don't want to cluster too many buttons at the top, but are the Forward / Back buttons really necessary? Wouldn't it work with just the drop-down?