We've become lazy and don't want to open .xamls in a code editor ever again :) but there are still small features like KeyboardNavigation.TabNavigation and KeyboardNavigation.DirectionalNavigation that we need to add to e.g. every ListBox and it becomes easy to forget or if UI designers are restructuring a bit a Listbox could get deleted and then readded but it wouldn't have these features on it.

I imagine it shouldn't take a lot of time to expose these settings in the Studio (therefore I've upped the severity/priority to major)