NO. xUPT tile limits are not the answer. People need to get away from this idea. There should be no limit to the number of units that may be stacked on a tile. Simply for the purpose of easing logistics and not needing the nerf economic production this is important. Civ does not have enough room for tile limits. Instead, the cap per tile needs to be on combat-effective units. i.e. the number of units that may attack from a given tile on a given turn. Combat-effectiveness needs to be balanced on offence and defence (e.g. through a suitable system of collateral damage, escalating combat penalties due to crowding, or some other acceptable means). This kind of approach eliminates the chore of managing logistics for 1UPT, eliminates the offensive and defensive dominance of the SOD approach, AND opens the door to new combat mechanics - for example ambushing a stack in transit using guerilla tactics.