Updates
One thing that is really annoying me is the inability to select units via the military advisor's page. it'll list out the units, what they are doing, etc but when you double click on it I get some random worker (when I didn't select a worker). Makes it a real pain to find your units when you have them set to explore.
Haven't tried this since the patch to see if it fixed it but I did find that the info panel in the upper left (where you can switch between science, military, and cities) does work properly.
I won a military victory by capturing the capitol and didn't have to touch the other cities (I was playing against only one AI on a duo map). Not sure if I like that. I don't want to use the option to make me hunt down every unit but I should at least have to capture all the cities.
Ok looks like to win a military victory you just need to capture all of the capitols. But if you want to completely eliminate a civ you do need to capture all the cities (except for the last civ since capturing their capitol ends the game). Not sure how it works if your capitol gets captured.
Some other stuff:
City-states get votes for Diplomatic victories. If you are allied with them then you'll get their vote.
Spaceships: Only 6 parts needed. However, they are expensive like units and I'm not sure if you can rush them. One kinda cool part is that once you make the part it is a unit that you have to transport to your capitol.
Absolutely worst part of the game: The future tech features a quote from GW.