The FPS problem went away after I applied the -no_vsync flag. And speaking of flags:
-nospec (disable specular): improves the canopy so much that I don't even find necessary to make it transparent anymore!
-noglow (disable glow maps): this will switch the MFDs off
Here is a test I made earlier, but it's already obsolete since I changed the viewpoint to get that yellow blinking MFD out of the field of view: https://www.youtube.com/watch?v=kFriwWTZte0
(sorry for the lights... or the lack thereof, I was super excited to have cockpits back and got carried away making the background dark as I like it)
It is going good, I'll update tomorrow with more info
(the dynamic primary linking showcased at the end of the video will be a separate mod)