Ive got to agree with you JCoyote.

I've heard it was changed because in MP it and the old tower control system was making sieges extremely easy for the defender.

Without meaning any insult however, it's my opinion that much of this is the MP communities own fault for insisting on playing with equal florin levels. The entire point of towers, walls, gates, boiling oil and all the rest if it is that it gives the defender a LOT more firepower and ability for his army size than an attacking opponent. In effect, even with artillery and siege equipment it SHOULD take a significantly more expensive attacking stack to defeat a given size of defending force.

Rather than nerfing siege defenses to hell they should have introduced an algorithm into the custom/MP battle selection mode that ensures the attacker always has say double the defenders money. Thats the theoretical ideal IMHO, that a defending force should be about equal to a double size attacking force.