We will experience the same problems replacing Lindelof with Tuanzebe. He's weak in the air and doesn't dominate aerial challenges. He is superior to Lindelof in terms of aggressiveness when it comes to defending, however Lindelof has better reading of the game. Lindelof is the superior CB at the moment.
I do feel we need another CB; however there is other areas we should address first. Signing AWB makes the right sided centre back job a lot easier as he's very good defensively and won't get caught out too often. Smalling and Maguire would be our best partnership IMO. Smalling is very dominant in the air like Maguire, he's quick and defends well as it comes naturally to him. Obviously his passing out the back is a major problem, and we would struggle to get out that right side with him and AWB not being amazing on the ball.
Jones can go, he hasn't ever shown enough to be considered a proper united CB and he's always a few games away from a major mistake/injury, same with Rojo.