When the siege system gets implemented we could perhaps get a bigger focus on ranged combat and marksmanship than we currently have in the game, maybe allow players to shoot from walls/towers and allow raiders to shoot back at people that are in the walls and towers?
This way we would have more use for marksmanship and archers, as it will become a near necessity for both defenders and raiders to have them.
This way sieges would be more than just setting up a ram, waiting for it to dry, breaking gate and killing everyone. In this scenario you would actually have to wage ranged warfare at the defenders shooting you from the walls while others are ramming the gate.
This would surely create a wide range of possibilities for combat and for the siege system, would make it possible for the implementation of several interesting dynamics to the game.