Not sure it would even be a relevant situation.
I would like to be able to dump fuel from an aircraft. Of course only those capable of dumping fuel. It could increase the glide distance if your engine is out. Got a full load and about to get into a fight? dump fuel to lighten the load before engaging.
Again, im not even sure that it was possible to dump fuel in WW2. If it was however It would be a nice feature to add.