When an AI unit in Arma 3 is remote-controlled by the Zeus, the Zeus has very limited control over that character. They are unable to issue orders to other AI units and Side/Direct/Group chats do not work with other players, even if they are next to you or in your squad.

The Zeus is unable to make a mission and then partake in it properly, or rather, a player in a server cannot also have god-powers to adjust the mission if something goes wrong without having problems with controls or the chat.

The chat is particularly bad as ACRE will not work for a remotely controlled AI unit.