We currently have 2 fighter planes per side.
Sadly they are in both cases the "good fighter" and the "not as good fighter that nobody uses".
It is particularly a problem in the British side where the VA spitfire makes the VB completely obsolete.
It is currently a no brainer to use the VA for anything that you would pick a fighter plane for.
How about making these two planes more specialized so that one will have to lose something in order to gain something?
The VA which also has the radar etc should be the fighter for taking out fighters with its 8x LMG being best for small and nimble targets. Meanwhile the damage of the LMGs on heavy/armored planes should reduced in order to give the VB a chance in the sun and make it a more grim prospect to take on a bomber with LMGs.
The VB which has the HMGs should get some bonus vs heavy planes so that it will be the go to choice for shredding any plane that is not a pure fighter.
The same should be done for the B 109s so that we can once again see a G-6 variant instead of only the G-2