The appearance of monsters in the game has been a show-stopper for me; they come in with way more than anyone else, and bring to bear 900kT monsters while everyone else is struggling along with 300kT destroyers. By the time they arrived, they were invulnerable to minefields, shuttlecraft, and most weapons of the era produced to-hit percentages just over 1%.
So I've done some tweaking to the monster hulls. Turns out they weren't being charged for tonnage. Also, the hull sizes were rather haphazard. Below is an overview of some changes that balance them out. Also, being space creatures, the prices are weighted toward Biological instead of Minerals. Prices are listed at the end of each row, as Minerals-Organics-Radioactives:
Code:
TL1 200kT Frigate Entity 50-200-100
TL2 290kT Destroyer Calmarian 75-290-145
TL3 410kT LightCruiser Tarrellian 100-410-205
TL4 550kT Cruiser Combat Drone 150-550-275
TL5 710kT BattleCruiser Crystalline 170-710-375
TL6 810kT Battleship Gomtuu 200-810-405
TL7 10mT Worldship Doomsday 2500-10k-5k
Also, adjusting Monster Tech to 100k cost in TechAreas, because it's used as the primary hull tech.