Actually, that's very often not what it does. The pie rule only works when both parties are highly adept at their assigned tasks. If the slicer is poor at balancing but the chooser is good at gauging each side's strength, then the slicer cannot help but include some imbalance that the chooser will exploit, and thus places himself at a disadvantage no matter what he does. Conversely, if the slicer is good at design but the chooser is poor at evaluation, then the slicer may deliberately provide misleading cues and trick the chooser into selecting the weaker side.
Thus, in many cases, applying the pie rule to game-balancing encourages confusing and misleading design decisions, to minimize the odds that the other party can correctly identify or utilize the advantages of each side. I think that would generally be regarded as undesirable.
But even in the best possible case, it only motivates you to balance the game, it doesn't provide any tools for doing so.
Actually, that's very often not what it does. The pie rule only works when both parties are highly adept at their assigned tasks. If the slicer is poor at balancing but the chooser is good at gauging each side's strength, then the slicer cannot help but include some imbalance that the chooser will exploit, and thus places himself at a disadvantage no matter what he does. Conversely, if the slicer is good at design but the chooser is poor at evaluation, then the slicer may deliberately provide misleading cues and trick the chooser into selecting the weaker side.
Thus, in many cases, applying the pie rule to game-balancing encourages confusing and misleading design decisions, to minimize the odds that the other party can correctly identify or utilize the advantages of each side. I think that would generally be regarded as undesirable.
But even in the best possible case, it only motivates you to balance the game, it doesn't provide any tools for doing so.