I would say more changes than what merely qualifies as "most."

Repainting R2's dome while in space back to black (ie. intentionally reinserting the original inconsistencies) would, I think, be one of the many above-and-beyond sorts of changes that doesn't come across when you say "most."

What you really mean by "most" is that there are certain original elements which border on unknowable as to what exactly they looked like originally, so you won't exactly claim "all" of them as fixed.