There are mods that modify how automated ship points work: I would suggest looking into those mods to see if they provide what you're looking for. I'm probably not going to include any significant changes to automated ships in this mod for a couple reasons:
1. The DP multiplier is calculated for the purposes of the Automated Ships skill and its readiness penalty, not its actual in-battle DP cost: last I checked the multiplier shouldn't be getting applied to the overall fleet score, so a Radiant should count as 60 DP for max fleet size regardless of core installed (barring things like Derelict Contingent, etc.)
2. Since there are a few mods that already affect Automated Ships (either the scaling or player skill itself) I don't think there's much value in reinventing the wheel, plus keeping the scope of the mod limited helps avoid potential conflicts with those same mods.