First let me say that, after having played a game through from start to end, I really like it.

Please take the following points as constructive criticism and not whining. However, there are some items in the game I just do not like or understand and would hope to see them corrected in a future patch possibly. They are:
1. Fleet management. Its like hell, at least for me. Most of the times, when selecting a ship or a fleet, the previous is not deselected. Thus when I move the fleet, the other fleet moves too. Worse, I do not even know sometimes which fleet was selected. Especially problematic on a gigantic map. Please make it so that selecting a ship or fleet automatically deselects the preceding. Workaround I use is to select a planet inbetween, but when I forget to do that... chaos...
2. If you want to group together several fleets (which does not work as of now, all fleets move independently) all fleets in the group move with their own speed. This leads sometimes (quite often) to transports being unprotected... Please make it so that a battlegroup (group of several fleets) can be selected to move with the speed of the slowest vessel in it. So the fleets stay together. Otherwise its one heck of micromanagement... This does not mean the fleets should also attack together, just move together.
3. To make a game more structured, it would be nice to be able to see when clicking on a goto mark (the blue circle when you told a vessel to go somewhere) which vessel or fleet it belongs to. Kind of goes with point number one.
4. I would like to see battles with space stations. When you spent hell to upgrade them, then I at least want to see when they are destroyed. Also, space stations are pretty weak regarding what goes into them when they are fully upgraded. A fleet which costs a lot less than the space station in total can easily eliminate it. Solution could be to give the space station first strike or better defenses.
5. Colony management of the AI is weak. On painful, I conquered a class 26 planet. That was well behind enemy lines. The AI built on the planet 10+ cultural centers and built some silly item on a space with 100% research bonus. I would have used that differently. Also on other planets that I conquered, the AI did not do that well of a job (however, I must say luckily, as the game overall is difficult).
6. Upgrading ships: I do not know exactly why when upgrading a design you are given several choices of the preceding ships of that class. If I upgrade a design I do not want a choice what to upgrade, I just want to be sure that my colonies built the new design. So the choices for me are really confusing.
7. There should be an option to turn off the AI making new designs. I mark them obsolete anyways. Moreover, it should be easier to save designs to use in another game (I think there is an option for that but it has not worked for me thus far).
8. I really sometimes wonder if the planetary bonuses of buildings are computed correctly. Especially for approval and morale enhancing buildings. I often build approval and morale boosting buildings and nothing whatsoever happened. On one planet, I even had a +300% bonus - it was a class 12 planet, and had a sports arena on that tile and on two other tiles, tax was at 35%, population at 17 (which gives penalties, I know) and I had a fully equipped moral resource and a few galactic boosts in addition to a race morale talent. Morale was constantly at below 40%. Other, much worse equipped planets were far better moralewise. Just one example. It would be nice to have a detailed plan how or why that is, not only the mouseover where you do not really see what goes into the bottom line as all values are aggregate.
9. Fleet gatering points (or whatever they are called, eludes me at the moment). It would be nice if one could not only set or delete them, but also move them. Like drag and drop. Or to put two of those points together, merge them. With just the two options set or delete, if you want to change something, you have to set the rally points (ah, remembered again) all over again. Tedious.
10. Moreover, when setting a rally point for a planet, I would like to see the location of the planet and that of the rally point on the map that pops up.
11. Savegames. Sometimes, when saving a game and then reloading, the other races (major and minor) had other techs than they had before the saved game. I do not know if this only applies to the techs, but I would expect the same scenario after saving a game and then reloading. This is as of now not the case.
12. New minor civs. This is really just an aesthetic point, but when a new minor civ comes into the game, I would like to see the planet they are on change in appearance. You did a great job in making the planet pictures match the planet class, but for the new minor civs, they are often on a small brown hunk of rock which is then a class 15 planet.
13. Last point is for multiplayer

But on this i will not elaborate
Thanks again Stardock for making such a good game. I hope some of these points above will be looked at. At least for me, the game would then be even better.