Bridges would be fine IMO but destroyable bridges would suck. In several of the outlined scenarios, a single guy can up a formation of Ju88, B-26 etc and kill the GV fight. After that, F6Fs can bomb the enemy GVs at their leisure. So you suggest multiple bridges, so I get some squadmates to help bottle up the enemy GVs, no problem. This works in the AvA because there are low player numbers, controls on bombers and multiple bridges at the bases in question.
Not trying to be a party poopper.