so, the player can't create a huge empire because that'd just be more fun than players are allowed to have. fine, whatever. 

however, since you have to sit on a system for a while before you can raze it (because logic) you shouldn't be penalized for that also.


I'll also agree with a true addition of a 'raze system' mechanic that just takes time, manpower and boomsticks with some tasty diplomatic fallout as a result