Grossly, insanely different PD strengths

[Tichy]

In MP, I find that strong PD nations actually make the strategic decision more complicated. (Granted this is on the basis of having played exactly 3.5 MP games: Perpetuality = 1.5). If you know your PD is trash don't use it. Plop down PD 1 so scouts can't raid you and ignore the rest. But if you have good PD you have to decide whether or not to invest in it.

TC PD11 can stop most random event indy raids, for example. Prevents some income loss and diverting forces to retake provinces, but at the cost of a less mobile army.

But even here, the strategic decision never thinks PD v Human Opponent.