How about adding hit report to the film viewer ?
Example:
You hit an enemy plane with both MGs and cannons. How about messages of type:
"...20 mm hit the vert stab
13 mm hit the elevator
13 mm hit the elevator..."
I know it should not be a priority, but it might help to analyze what happened exactly.
It would be very useful to know what weapon enemy used to bring your plane down, so the messages should work 2 ways.
Green for your hit on enemy planes, red for enemy hits on your plane, for example.
Since FE has the data on those things, it shouldn't be too hard to implement, nor would it be much more work for CPU.
P.S.
Still whining for losing the fixed view in film viewer.