Ideas to stop mass castle building for DOM_3

[Zapmeister]

baruk said:

I was thinking that being able to take a castled province in a single turn could be a might overpowered, eg. if you have a large flying army, you could be taking a castle every turn, whilst the defender splits up his forces, or gambles, in order to try and defend them, in the same way he would if his provinces were unforted.

Alternatively, the smaller fortresses (mausoleum, watchtower, wizards tower) could be roofed, which negates the flying siege bonus.

EDIT: Oh, I see. You're referring more to the mobility of flying forces rather than the siege bonus. Fair enough.