I feel that the line up is still missing something. I don't know who else would need to be on The team but someone else thats known that T'Challa can Also interact with and get fun stories out of.
I mean the most I can think of has been when he has been by himself doing his own thing, which feels less like the chairman and more of the lone wolf seeing the endgame stuff. The avenger's cartoon did a better job when he took over as the leader to showcase his ability then what we are seeing here. By letting CA and CM assuming leadership stances and dialogue while T'Challa is just there makes its all the more frustrating. Then throw in that he gave the team back to Steve, I wouldn't be surprised if Steve was the leader again. Which is lazy and spews mindless lip service all over the place without substance to back it up