I did not have an issue with any pieces being loose in the box and there were actually quite a lot of extra pieces. Once the set was built.
I didn't notice any issue with the wall plates being loose or coming off to easily. Once they were n place they seem to hold well until I need to open it up.
I noticed the issue with the double print overlap image on the cockpit build, it was only on 1 image so not bad. Probably all the initial manuals were printed that way.
The top piece does need to be removed to push the on/off button, but the whole plate is held with two studs and removes easily.