1/ Can you please clarify
2/ You don't think the largest part of the kit the fuselage, is equally important if not more so. You'll find that with most kits the areas you have mentioned are more often than not corrected by means of aftermarket items, your own Mirage2K-5 being one with wrong radome and exhaust which has been addressed by KASL. I cannot think for a minute that any AM producer will market a correct shaped fuselage to rectify the G's shirt comings and any modification to correct the shape by 99%of modellers(including me) would be a non starter.
I don't know if I've read the last part wrong, but why would you pass the CADs to someone "who has no idea about it"?
3/ Good to hear, I've found that most of the problems I have building Kinetic kits is that they are over engineered, were a more simplified approach would be most welcome, the F-5A being one.