Oh god please no ladders, specially in siege, they just circumvent the structure of a lot of castles breaking the balance in a bad way. Castles are designed with a certain distribution of chokepoints and open areas, and this just allows people to make a bridge straight to flag, breaking the flow of the game, which forces defenders to camp flag or die and lose more often anyway.
Not that it matters, with siege being dead, but thought I'd share.