Kaltrun I think you are beating a dead horse. Most people are saying don't allow them at the entrance, decrease the damage, etc (which it seems like you agree with). They should be supplementary, not the key parts of battle. I think you are seeing knee jerk reactions to remove them because they are so -_-ty right now. Obviously if they were better balanced (I doubt gravity/warp portal/whatever) will do a good job balancing), then people would still complain but you would atleast see them try.
Most people are not taking part in the activities and learning how these mechanics work because we will just die to OP siege items. Maybe after they make some fixes you will see people trying things out.
The siege items should really be supplemental parts of the battle. Like you need something that greatly helps you break a door down. Defending guild has some item that helps them do large AOE on attackers at choke points. From my limited experience I just saw 7k damage catapults falling all over the place.