It's bizarre to read that the F3 view is an unfair advantage in a plane that easily sheds control surfaces and more vital parts if stressed, and has absolutely no rear view from the cockpit.
Without the outside view, there would be NO fight with an A-20 because the pilot won't see you coming, you might as well go shoot offline drones.
Comparisons to the 110s, Mossie, and even the 410 actually make the case to leave the F3 mode in place. Compare the rear view in any of those rides to the rear view in the A20 (or the Il-2 for that matter) and it should be easy to see why the original decision was made to allow an F3 view.
Add to that, in the A-20s cockpit, when I use a combination of the views UP+FORWARD, UP+FORWARD/LEFT or UP+FORWARD/RIGHT, the bandit's plane is still there, but the Icon disappears. (I think it's a sorting bug.)
I don't understand why people think any plane with outside views available, are only flown using the outside view. In practice, it's the only way to track the bandit in your rear hemisphere; the same ability available in any P-51 or Spitfire without F3.