Do you get it? I guess not. The armor is great, it can take more then twice the cannon rounds then the other planes in the setup. Its 6 .50cals are/were the best loadout in the setup. It doesnt need speed or turning ability. Its shear survivability and armament makes it uber. Just like the Hurri2C in the EWMA. Once f4f was added in the first war thats what 95% of the allies flew.
Iv notived that allies have/had a few non early war planes I guess they were added to "balance" the arena.