My personal view : I truly hated the Stacks of Doom in previous Civ Games, I never wanted to spend 100 turns building up a army to take out enemy units and cities, I mean even the barbarians had stacks. In CiV I was more finally able to go be the warmonger and not worry that I will always lose, so I am for 1UpT. But I've read and read that everyone hates, and I can understand why, being used to stacking for Four games and several eps. But maybe there is a solution to satisfy both sides? Do you think people would be satisified if in game options you could toggle between 1UpT and Stacks Allowed? How about if the whole system was re-done, and maybe done like in Total War? with Armies? You could have units divided into several gropus within the army (long-distance, defensive, offensive) etc? I think that could work and would limit the amount of units in a stack but still allow it.