I'm pissed. I just learned about this on a fucking Engadget article with the subtitle "One unit per turn is gone." I got so excited, thinking if one unit per turn is gone maybe they're going back to a lot of the core principles from IV, maybe even some features from 1+2. Then a little reading shows 1 UPT isn't really gone at all, you can just combine a couple units together so that each square can now both defend and attack well. Fuck that, I hate 1 UPT and will not be trying this out, especially with those shitty iOS graphics. The Civilization franchise is trying to cater to the common man the same way MMO's now try to do so. Hand holding and no danger. The danger level you feel in Civ V is a fucking joke compared to Civ IV.
My ideal next gen civ game starts with the core concepts of Civ IV (loved towns, don't know why they killed them in V), maybe takes some of the social policies from Civ V which was one of the few new features I really liked about that game. Bring back stacks, but implement some of the old school features to help with the SOD problem a bit. In Civ 1 and 2 when the top unit in a stack died, the whole f'ing stack died as long as it wasn't in a city or fort. So you could stack but you had to be very careful how you did it. That might be a bit extreme, but you could easily tune it a bit... kill the top unit in a stack and there's a variable chance to kill another 20-50% of the stack or something... it's not hard to fix SOD's without going to the shitty 1 UPT.
So many old school players hated 1 UPT, and Firaxis is saying we don't care. They put a tiny band aid on it with this crappy unit combination thing (did not care for armies in Civ 3), but for the most part it seems they just don't want to admit they were wrong on it. Will definitely not be putting my money towards this unless I see some old school Civ players giving it a lot of props and say it's more like the originals (1-4) than Civ 5.