Yes part of it is perspective and camera, but I don't see HOW the p51 cockpit can "look" so narrow.. it's like there ISN'T a huge-arse honking engine in a long nose right in front of you, and you can "look out" the side windows forward of the sliding canopy, but still see "ahead" of the plane (when really you'd see more of what the spitfire sees now).
I think they're still perfecting it. It's more there (the angle) on the spits, less so on the p51, and less so (but for opposite end of the spectrum) on the 190s.
I liked the early Ki84. I felt it was a really wide, spacious view, much like the p51s we have now. It got closed up a little, to a more moderate (more accurate, I'd also say) view angle/position.
I think the 190 just needs to be opened, and the p51s closed a lot. The frames themselves aren't too much of an issue. Okay they ARE, but they're a separate issue.