I'm not arguing to introduce something to upset the balance of gameplay.
I used to fly IL2 a lot back when I had more time and in that sim there were things that were off that really affected gameplay. I think the elevator authority on the Me109 was one example. IIRC this was off in IL2 in the sense that it seemed more connected to TAS than IAS.
I still think it would be good to get everything on the table (also the stuff you mentioned) but compressibility is one component there as well. As I said, I guess there are more pressing fixes to do to get the balance in gameplay right but that does not lessen my curiosity as to how the currently modelled planes behave in high speed dives
