They definitely have changed the software since you last tried it, but I don't know if it has fixed the problems you have found...
I contacted Pascal yesterday to enquire about the PI-X4 board, and he responded very quickly! So have decided to order it with the add-on sound board for a Hulk pinball. The owner contacted me about it after purchasing the machine with no boards or displays... so this will be my first time using the PI-X4 board... unless of course I go to Nino's place for the party first!