It shouldn't be removed from the game but it should be taken out of the arenas and the DA during all flight. Used as a teaching tool in the TA only.
You have the 1,2,3,...etc positions to look around no reason you should fly around like wonder woman outside your plane.
Why should you be able to have a better view then your gunner would have?

We don't fly A-20s straight and level, like other bombers.
Explain to me how jumping from cockpit to gun position is practical while in a maneuver fight... If I had a gunner/observer, that would be fine. I don't have a gunner or observer and I'm blind behind. If I'm in a fight with more than one enemy nearby, shouldn't I have the means to track them relative to my aircraft? You can see behind in a Stuka, a 110, a Mossie or 410. We don't shoot or bomb from F3. Both the A-20 and Tu-2 need F-3 to provide the eyes that would be there in the real world, to offset the lack of rear vision.
I fly the F6F-5 in base defense as well. I almost never lose one fighters or GVs. It has some rear vision, much better than the A-20. I kill just as many tanks, and completely embarrass enemies in fighters, foolish enough to attack. Should we perk the Hellcat too, because people use it to its best capability?
My suggestion is this... Rather than ask for any plane or tanks to be perked, adapt, improvise and overcome.
Ground attacks will get crushed without air support. Combined arms... Organize.