*it does not block railguns
and you cant place avo/ogo/xanion turrets on trinium armor
but yeah, very good ideas, or highlights of useless things.
A short list of not used things in Avorion:
Battery blocks, Battery modules, flat number Cargo upgrades, Scanner range upgrade, Ancient key, AI upgrade (because 120+ fighters in sector can cause lags/crashes), Lasers, Bolters, Plasma, Anti-Fighter, Pulse, Habitat, Biotope...