It's a bit strange that you can use components such as the Turbocharger and Supercharger along side jet engines

And some suggestions-

2. It would be nice if modern air frames had like 1 or 2 more special feature slot(s)

3. Maybe add early Air to Air or Air to Ground missiles exclusive for modern air frames or planes with jet engines?

Since this is a late game feature I understand that this stuff is over looked to focus on features that matter more. As for myself only mention these because I like to extend my games out to have a 'cold war' between surviving majors.
Love your mod! Better than other air reworks i'v used