If you think the planeset is unbalanced now... and add a plane like the F8F, you will get complaints on a new scale. There are at least 100 aircraft that could be added before the F8F. I think a priority should be the early war planes, too much emphasis is put on the late war developments. There are a lot of interesting early and mid-war planes that would be a joy to fly. Try the Fairey Swordfish for example, it served well during the war. Gloster Gladiator, the French D.520, plenty of russian bombers to choose from, the Beaufighter, the He111.
Just pick one... and it'd be a great addition. The F8F is just because you think it'd rule the sky, and yes it might but for what purpose, to improve your personal score? There are dozens of aircraft that would make new scenarios and FSOs possible, the F8F is not one of them.