The one I have always missed is proper focus-follows-mouse support. The mac desktop always feels really clunky without that when working with multiple windows.
Proper focus-follows-mouse does not autoraise the window when it gives it focus. I see that that app does offer "don't raise the window" (which I think is an improvement from last time I was researching this some years back), but only under an "experimental feature" flag that relies on undocumented private macos APIs that might go away in any future macos version...
