One of the very few minor complaints I had about the GalCiv games was that the documentation that shipped with the games sometimes did not do a very good job of explaining some of the complex game mechanics. This left me frequently feeling like I was "guessing" about whether I was making good decisions on many things...sometimes for months before I could find decent answers to some of my questions. An example of this was figuring out how to place influence starbases, etc.
Now I know some people will say you are supposed to have to figure this stuff out, but I still feel that a few games like the Civilization series often have more thorough documentation and that this can really help customers more fully appreciate all the hard work put into the details of these kinds of games. These games are all about decision making, so the more you can do to help people understand the reasoning behind the decisions, the more fully they will appreciate the depth of the game you have created.
I bet a lot of people would even be willing to help with this. I know for example I would work for free to help improve the documentation if I was involved with the beta and had access to ask questions, etc and I bet other people would be willing to help as well.
Stardock is a company I thoroughly respect for the way you really seem to listen to your customers, so I hope this suggestion is useful to you. If there is anything I can do to help, I would be quite honored to contribute something to this game...