It depends on what system they want to play. He’s a little wasp who will buzz about in front of the CBs
The main reason. Xhaka and Cabellos are playing, is because of the third CB, which gives us (loosely) more creativity.
If we go back four, and find more driving creativity, he becomes vital.
Who knows. Top little player IMO, he’s just unlucky because the people around him aren’t those who can let him play his natural game.