Cargo Hulls are too powerful at 90 capacity. They just carry too much stuff. You can make double constructors without any research. They are especially good as Carriers because they are cheap and can fit several modules. Should try 80 capacity.

Carriers still seem overpowered. 45 capacity might be too low. Should try 50 capacity. Also, while Assault carrier modules are not affected by Transportation Specialization, both Drone Carrier Module and Guardian Drone Module are. I haven't checked but I assume that High Capacity Carrier Modules also get the mass reduction.  Carrier modules should cost at least 50, if not more. Any ship with 2 or more Carrier modules,  is probably broken.

Also, has anybody noticed whether or not 'Skilled'  from the Benevolent Ideology is working? It doesn't seem to do anything for me.