[@Voltus_Ventus]Why having more types of aircraft a bad thing, even?
Neither it should effect balance nor it would be unrealistic. WW2 nations literally had several or dozens of active aircraft types even at the beginning of the war.
On the other hand I can't see why would somebody need to compensate for not having airships.
Bomber planes and airship bombers technically have the same role but with different approach.
You can easily have both, albeit due to it being more expensive airships are better to be safe from enemy fire thus bombers are perhaps better for the role.