1. Make Build Points / Wealth Cost for all components square rooted from their sizes (the same as Research Points now) instead of linear.
2. Add a modifier to Hit Chance, square rooted from the target size (with x1 point at 1000 tons as a natural watershed between spacecraft and starships).
(Side note: square root isn't the best as realistical approximation, yet it's simple, and it's too exciting for before dinner to tweak formulas with intersections between average target effective projection and gaussian distribution of impact trajectories, where this gaussian isn't flat enough to pretend it's even.)
Light combat ships and fighters will become less vulnerable, yet relatively more expensive, so overall balance might be preserved, with a shift to more elite-like fighter forces and recon role for light military ships.