As #phosh on #PineTab makes no sense to me and is not optimised, I installed #Gnome and removed Phosh.
Gnome behaves sluggish (as expected), but usable. Rotating the screen on gnome is a bit tricky. (In settings there is no display-tab in mobian). I set a keybinding for rotating, which only works with keyboard attached. When going to sleep and waking up the rotation changes. Sometime touch does not work with some Applications. I really like it but there is still a long way to go.