That's only relevant if you want to fix power creep. If you think everything is well that's fair too.
imo power creep was a deliberate move by frontier and is a part of their strategy, and while opposition and criticism from the community does exist, it's testimonial. so ... good luck with that.
apart from that your proposal would make sense. there would be an easier way to do the same, though, by making modifications free (or almost free) and accessible everywhere and consider them just 'ship tuning'. this way no stat would need adjustment.
but while making fully engineered ships the new baseline would be a good thing, there is still much broken with that (like uber shields and vultures with endless power and nearly racing speeds). to fix that there is only one direction: backwards. and since we're speculating in dreamland anyway, i'd prefer a rework:
- simple version: nerf all modifications a full 90%, get rid of synthesis and most special effects.
- very involved version: completely rework all modifications to be actually 'customization', i.e., sidegrades and compromises, not braindead bonuses.
- radical version: remove engineers completely.
yes, sounds impossible. just like the very idea of ever getting rid of power creep. not going to happen.