Just a thought on the FOW, there is really a big difference between 1) what you can see at a particular point in time, 2) what you remember being at a particular spot and 3) what other races are willing to tell you about what they have. If we are in peaceful communications with another race, shouldn't you expect to exchange data freely (or somewhat freely) about what planets you own and what star bases you have constructed (maybe not of ships or terror stars)? And once you have discovered something by sensor, you would mark that on survey maps, even though your sensor platform moves. Also, if you go to war with a race, shouldn't that information flow stop? Then you would have information about where and what the status was of their stuff the last you knew, but things like improvements, defenses, star bases, etc. could change without you knowing about it until you could bring them into your sensor range again or re-establish peaceful communications with that race. Wouldn't it be interesting to have a spot marked on our survey maps as containing a star base, then bring our sensors to bare on that spot to find the star base gone? "Oh, Oh! This looks bad for the home team."
