Just make War Thunder with Spacecraft.
But for real, I know you have fighters in the game. Never seen them, never got in a team elimination, but the idea of being able to zip zap between the bigger ships sounds awesome.
There are also alot of people who want more players on the field. While 20v20 capital ship combat sounds chaotic, giving every team a squadron of 10 fighter pilots would simply be really cool.
You could add a filter to the matchmaking where you choose to always/both/never join as a fighter and of course add a lot more fightercraft to customize (and sell colours for, wink wink)