1: On a 4K screen, the lower toolbar is hard to see. I understand it's greyed out when inactive, but could the first tab's text be i.e yellow rather than black, to show users there's a UI option down there?
2: Please consider renaming Deform. Alignment and flipping aren't deformations - Maybe call it Islands? it'd signify you go here to tweak your islands
3: This may be muscle memory from the last public version from a few yrs ago, but when I went to Modify, I expected to see the Gizmo I was used to. Are these tools coming back into the UI, or are they hotkey only, now? (also - I sometimes have the Tab/Q option slow in response, will dig more and file a bug)
4: Typos - I'll give you a list when I am done
5: This is a NiceToHave, not a MustHave, but if I load a custom UV-grid, I'd like to be able to define how much I want it to tile
6: Is the groups/Materials/Smoothing Groups UI/button set coming back?
7: A lot of applications have the ESC key as an option to deactivate the current brush or Modifier, and when pressed, you get the default pointer in the UI. Would this be possible for U3D? It's a NiceToHave, no Must.