Two very good ideas!(i promise)

[Xietor]

Which is why you would have to pay points for it. You may have to sacrifice something else to alter that weakness.

It would give more versatility to playing each race, and an opponent would not know if you could buy sacred troops at an enemies castle or not. Of course, he would know whether you paid for better pd pretty quick.

And it would not be limited to races with weak pd, races with strong pd, may want to make their pd even tougher.