My major concern is that in the latest Ars preview they state the game is maybe about 16 hours long and really doesn't seem to have any replay value. So no random maps, editor, etc. is making me go 'Hrmm' now. I think I may hold off for a little bit after launch for some more feedback.
@Cutter don't believe that dumbass. He even claims no replay value? He is no X-Com fan. Shit he must not have played the version he had for very long either. Otherwise he would have noticed all the C & C (choice & consequences) built into the game. I read the review and knew right away the guy was fucked in the head or full of shit.
Per Firaxis there are over 80 maps... though not randomly generated maps they have randomness built into them... random spawn points and random alien mix. Randomness built into the way the game unfolds. You'll see thirty something maps any play thru because of the different choices you've made. Fifteen hours was the low number on a play thru though I am assuming that is after you have played thru a time or two and learn a lot of the tech tree choices in advance. See my edit below for a link to the video interview/play thru.
I am sold and may also pre-purchase the Steam version now that Civ V is a sure thing. I want this game to sell well enough that they do an add-on or two. And hopefully another full release.
edit: And here is the question and answer... jump to 43:30 of The Giant Bomb video. Hell, watch the entire thing if you haven't yet.