I have exactly what we need: yet another lame idea to give carriers somewhat of a nerf.
Instead of any of the above ideas, how about this?
I could see this working as well, however, you still have the logistics issue. I can have 17 modules on a huge hull, this means that I would have 34-51 fighters depending on the carrier module. with a logistics cap of 40 currently I can have 4 carriers with equal amount meaning I have the following...
A fleet of 4 huge ships with 136 small fighters using 40 logistics, equivalent to 448 logistics.
or make the fighters count against the cap. then you get.
A fleet of 1 huge ship with 34 fighters using 112 logistics over cap, can't add anymore ships.
One could argue they would never be able to add ships to a fleet with the carrier, however, the carrier essentially is a fleet of small ships, potentially larger than normal, and still potentially OP.
Then you make a cap on carrier modules as I suggested capping Huge hulls at 3 or 4.
You then get up to a logistics score of 46 potentially allowing you to add other ships to the carrier fleet if you can get your logistics cap up to 60. Then you possibly though have the carrier under powered being each carrier took up space preventing weapons or shields on the huge ship.
Then I argue if you count the carriers against the logistics cap you either don't count the Huge hall toward the cap or count each carrier module as "3" or "5" depending on the carrier module meaning that each ship doesn't add but, the module does and offsets some of the initial logistics cap balancing some of this out. Example as below.
1 huge ship with 4 low end carrier modules (8 small ships or 24 logistics normally) then has logistics cap of 22.
This then allows other ships to be added to fleet, offsets for the space needed for carriers still counts against the cap and doesn't make it as OP using the above option from Chibiabos. In reality it's like having a free huge hall ship in the fleet, however, wouldn't be as strong as a huge hull ship with no carrier modules being one wouldn't be able to put as many weapons/armor/engines/extras on it. This, however, does give the carriers a little extra (which I believe is the design) with out going overboard.