it takes time to reinstall GSX but I think it makes sense. By the way it will garantee that passengers are seating properly and without pink textures (not into the A350 for instance). This is often an issue, too.
It tends but it's not sure. I don't know if it has to be fixed by Navigraph or Inibuilds. In addition, it would be more practical to show all buttons on the screen instead of only one we have to play several times with to obtain the right desired map. It's annoying I think
I don't know if it's a GSX or Inibuilds issue, but try to update GSX to the last version, otherwise you can slew the aircraft a bit manually to release brakes. It's not the solution but already something to make the aircraft rolling