These are just a couple problems that I experience playing the game. I wouldn't call them big, but if they were fixed, my gameplay experience would be much better.
The first one is that some planets changed after my first save. Not to differnt classes, but differnt maps. Considering that I played for five hour the first time threw, these planets were well developed and now most of the building sit on ocean tiles.
And the other thing is that in the 15+ hours I've put into my current civ, only 2 choice events have occured. (not the 'age of xenophiles' or 'pirates in orbit of a planet', but stuff like 'zombie soldiers' and 'corrupt corporations' good or evil situations). Since all planets have been colonized, I can't experience those types of events anymore?
If I didn't post in the right area, please let me know.