I wouldn't be against this because why would I? Tielemans is a good player, PL certified.
But the more I think about it, the more I believe we have signed the exact 8 we wanted, and what many are crying out for, he just happens to start matches at left back and move there when we're not quite executing on the gameplan. For the rest he's the midfield tempo setter. And Zinchenko's presence shoring up the midfield opens the possibility of a player with the attacking profile of Vieira or Smith Rowe playing Xhaka's role.