I just wonder if you are going to add WARP >1? Right now you can travel at c using your warp drive, but in the future, when there will be added more solar systems, players will really need to travel FTL. It might be interesting to adapt the StarTrek system, where WARP1=c, WARP2=8c WARP3=27c etc. assuming that game mechanics allow to travel FTL.