Sins is great fun, seems to have the potential to be well balanced. Although the late game needs some work. One method that might work is being able to build a capital size space station neat waypoints. At the moment it is too easy to jump in with 40 ships a destroy a system.

Another useful tool is the concept of fleets. Being able to hook say a set of flak frigates to a capital carrier. When you have a large (30+) mixed fleet with with capital ships and frigates it descends into micromanagement haze. Some tech that allows smaller ships to link into to larger ships and intelligent follow the commands of the larger ships would be great.

So a carrier with a fleet of flak and missile frigates, if it was selected to attack another ship then the flak frigates would not run off and attack. They would hang around and defend the carrier. The missile frigates would stay and defend the carrier (group?) from other attacking ships.