It would be handy if the left hand menu buttons had a visual indication that they'd been selected. In addition a change of the window title (to "Preferences - name of the selected button")would probably also be a useful visual feedback tweak.
If you wanted to get super fancy you could have a visual feedback on each subpanel to indicate where the cursor was. That's probably lily gilding though.
Be well, Thanks much, Best wishes, Happy Holidays
--
Dan Zbichorski /bi ˈhɔrski/ (beeHORSkee)
"Set expectations appropriately" -Zb.