to the OP:

nice title...
now seriously...
maybe historically it had no truly effective role in WWII, but in AH, i can see it being used (however rarely) as a kind of extra tail gun on bomber raids. park it around back, and chill with the bomber stream. tada!!
on the other hand, until the other, more important/effective aircraft/tanks/boats are added to the game, i think it should be kept out.