I would like to see a time multiplier for bomber missions. In other words, the longer your flight the more points. Not just damage.  It can take a lot of time to climb to altitude, make your way around radars, hit your target and make it back. 
I don't fly to many bomber missions myself, but some folks do. And yes, I know there isn't much to spend your bomber points on but it is the only reward there is. (except for the pleasure of seeing your target go BOOM!)
Just a thought.