What if Marley had sent Zeke and Pieck to Paradis instead of Reiner, Bertholdt, Annie and Marcel? I think Zeke could destroy the gates of the walls with his stone throws. And considering that this team would be made up of 2 extremely intelligent people, they could be more efficient

Another thing, I guess only Pieck could join the army because Zeke would be too old to join.The age for enrollment is between 12-14 years old, so I don't think Zeke could join. I also feel like Zeke could be quite useful if he infiltrated as a scientist using his knowledge of the outside world. Since Pieck is more focused, she probably has less internal conflicts when getting attached to the people inside the walls.