[Ace_Garp]

Nice ideas!
Currently, the combat system seems to be dominated too much by the "Biggest guns win!" idea.
There doesn't seem to be much that good tactics/strategy can do to influence the outcome of a battle.
I particularly like the idea of having features in the battlefield, this could lead to more planning and strategy in combat. Small fighters hiding amongst the debris, taking pot shots at the larger, less manoeuvrable ships.
Could be very cool indeed!
The gravitation idea also brings to mind Space War - the first ever computer game.