I like it. But
Turret coverage should be dependent on the number and distribution of AMC blocks.
I want a cost/mass step to be smooth - if you have a 100 ship you could choose between 2 numbers: 0-110 one or 90-500 one. dependent on hull to vital ratio or what you like it to be.
I don\'t like steps from 100 to 500. Too much of a difference.
You should count vital parts with 1, hull parts with 0.5 (or use smooth steps like I mentioned above)
RP ships are always bigger, because they use deko.