I would suggest a damage improvement in basic energy weapons. As Yngen pointed out in the first post, fighter hull is much higher in Discovery than it is in vanilla. If hull is improved by a factor of 2.6 shouldn't basic weapon damage also be increased some amount to balance? First off let me define a "basic energy weapon", this excludes: shield killers (they're all powerful enough already), specialist weapons (antimatter cannon, inferno, mini razor) and obviously explosives (missiles, torps, mines etc.) This leaves all the regular energy weapons say from level 8 up, as that's what the majority of highest level fighters use.
Take for instance my personal favourite vanilla weapon, the Kraken Type 2.
In vanilla, it does 586 hull and 293 shield damage.
In Discovery, this is nerfed to 556 hull and 278 shield damage. Why? If the original gun was too powerful for capships, shouldn't capships have been made stronger, not fighters weaker? Nerfing fighters any amount more will solve nothing. It will only increase capship use.