Strangely, in the second testing of akita tslib.sh the touchscreen works. Mouse pointer still disappears when matchbox is loaded. It does not stay for a new user, either. During the brief moments when the pointer is visible at gpe-login screen, the mouse is working properly now though (directions are no longer reversed as during my first testing).
Also, add one more vote for the Hentges spitz maxi-ROM :-D