Suggestions being thrown around that limited stacking should be allowed is fundamentally flawed. One of the key issues w/ SoD was that you had no choice at which units you wish to attack within the stack, which makes combat completely mindless as you throw either more units or better units at the stack to defeat it.
On the other hand if you are allow to choose which units to attack within the stack then there is no point in stacking as you can simply choose to kill the artillery and supporting unit one by one. If you stack multiple of the same unit to make the stack stronger, then there is no difference in balancing the game such that the original unit was stronger in the first place but takes longer to build.
W/ the 1upt system now, you have more choices on which units you want to attack limited by terrain and positioning. It actually takes some thinking in how your army approach the field, positioning of each unit, and the order in which each unit is destroyed. Each unit is now more valuable since it provides an offensive function in attack, and blocking function in defense.
Overall SoD was never fun, you simply build more or better versions of the same units and throw them at each other. Sacrificing artillery units to do collateral damage to a stack never really made sense. 1upt is clearly a superior system and the game is better for it.