[spoon]

Here's a few:

Prerequisite Components. For example, in order to have Quantum Engines, Quantum Torpedos, or Quantum Shields, you need to have a Quantum Generator on your ship.

Percent Required Tags. (Applies to Hulls - like what is currently done with Carriers and FighterBays). For example, in order to build a Missile Frigate, at least 50% of your components need to have the "Missiles" tag.

"Vehicle Type" and "Weapon Target" (components.txt) - use booleans instead of lists.

Self Destruct. Blow up your ship in order to do damage to all adjacent ships. (Ideally you would need some sort of SelfDestruct Strategy - ie under what circumstances do your ships blow themselves up? at x% hitpoints? When surrounded?)