ability to research new technology for insane amount of money and get something none have - more powerfull hull, more powerfull weapon or something similar.
Hull mods, other type of shields or engine, weapon that able to kill crew without much damage to hull.
Currently only advantage of player is human brain, this is not good for RPG and allow player to win only by swarming enemy.
Investing 1KK into experemental type of weapon and get cannon that bypass shields.
Invest 1kk into experemntal engine and get nontackable ship completely invulnerable to aimed missiles.
such options will allow player to choose playstile, small amount of bleeding edge technology ships or armada of midline-lowtech ones.
currenly only viable option medusa + fightest then capital ship + escort and mass ships wipe everything.