Well it would be a nice added feature, but I'm 50/50 on that it will be just like the original MTW. Since they have added the siege equipment brings the problem of how to take the inner fortifications.

3 ways to take the inner citadel in 1 turn a battering ram to fit through the main gate, ladders, and to have artillery. The safest way to take it would be by siege tower(inferring your army doesn't have artillery) and that would first require taking the outer wall, laying another siege to build the tower to scale the citadel walls. I don't think CA will go backwards and go back to letting men bash a gate open with thier swords. So actually it is likely it will take 2 turns to take a citadel unless you have the right elements.

Also while on the subject it would be nice to add to siege building items would be siege stones/cannonballs

Because sometimes, especially the stone throwing artillery took many months to carve enough stone to bring down the walls. Thus allowing tougher walls to hold out longer.