What we as enthusiasts will accept and what the average family visitor looks for are quite often worlds apart.
Many years a ago there was a survey done which showed that the aircraft came no 11 in the list of what the most visitors wanted.
Good toilets,
Good Lighting,
Places to sit,
Places to Eat,
Something to entertain the children,
Access for all including restricted mobility
Friendly and knowledgeable staff
Well cared for exhibits
Informative displays
Reasonable Gift Shop and Admission Charges
Once these are satisfied it is down to interpretation of the aircraft and seeing something different