I contest that, you can't run out of interesting military aircraft. I find alot of the often un modeled military aircraft quite interesting. And don't forget all the X-craft that could be armed. It's always interesting to see what could have been, but never was had some aircraft seen combat as they were intended.
It would be a noble effort, but civilian only flight would be better left to MSFS, the SF/WOX engine loses all its advantages when the simple fun of combat is taken out. in FS you have gorgeous terrain and weather, etc to make just flying around enjoyable, whereas when I fly a mission in SF where I don't encounter any enemies, I feel cheated.
Neutral civilian traffic in campaigns would be absolutely wonderful, much less safe to just fire off BVR missiles with a greater chance of hitting an enemy than not.