I agree. I generally like 1upt, but as I play more, I realize that it was kind of a heavy-handed approach to the stacks of doom..kind of like sawing your foot off because you have athlete's foot. I think that the problem with SoD's was less about stacking and more about battles being a zero-sum game. This is not an issue in Civ V due to the hitpoint system. Also, stacking allowed one tile to attack another multiple times per turn. I think that these two issues alone would make the SoD's far more tolerable and would skip the traffic jams and scaling issues in 1upt.