Mossie bombers did use formations at times, so I think the option should be there. It is up to the player to decide which risk is best.
Also, the Mossie bomber's first line of defense wasn't manueverablity, it was speed. It is very hard for even a Bf109K-4 to intercept a Mosquito formation that is at 25,000ft moving 300-400mph when the Bf109K-4 is starting from rest on an airfield at 1,000ft.
In AH most would not be able to plan far enough ahead to intercept a Mossie formation.