A full scale war between 2 sides featuring from the smallest scout to the largest space station or battlecruiser. I would totally dig that.
Smaller ships would be weaker but nimble while heavier ships would be sluggish but would pack bigger and better guns. Join them all in fleets in one or more new systems...add objectives or not, some sort of battle timer, point counter and either limited battle time or limited respawns and blamo... you got team deathmatch for freelancer with a tad of starwars like space battles.
would be fun.