With the current system it may not seem too important whether you link multiple weapon computer to one hotkey.
BUT with the weapon update that\'s planned, we do not want omni-weapon setups. Really, you dont want that. Limiting the setup to one weapon type per hotkey will encourage players to specialize their ships, allowing a pilot to use only 1-10 weapon types. More types can be controlled by fellow players serving as your crew, and by the game AI.