OldOldGamer: Agreed. I think DOS era with modern graphics and a slightly bit more details would be spot on.
Flight sim like DCS are overly complex and yet they lack:
* Polish
* Terrain variety
* Dynamic campaign
* Requires too much dedication
* Surprisingly... in the end lack realism :D
I think the perfect balance has been reached with Jane's F-15 and F-18.
You have not included the Falcon game series and Enemy Engaged series, as those has had the golden standard for dynamic campaigns and are for post-DOS. And they ain't so complex after getting to them.
Both can be modded to very good state, like AllMods for EE:CH and famous BMS for Falcon 4.0.
The BMS is now in 4.37 version and it just got couple days ago that released and it includes VR support, first time!
https://eech.online/mods/allmods/
https://www.falcon-bms.com/
But I do get your point, a simple games like Digital Interactive Apache Longbow and Hind are great examples how you get like 20-30 bindings and get far with just 10.