I'm coming around to the idea of not signing a 6 to cover Rodri, for one big reason - who is out there that would do a better job than Kovacic and would be willing to sit on the bench most weeks?
With the wealth of attacking talent we have, I think we're going to see Pep lineup with 2 attacking 8s most of the time, occasionally playing Bernardo, Kovacic or Lewis next to Rodri if the opponent calls for it. If we signed a Bruno G. or someone of that ilk, we'd have to play them most weeks. And that means either dropping one of KDB and Foden or forcing the latter out wide again.
I'd be happier if we signed a right sided defender to compete with and ultimately replace Walker, allowing us to push Lewis into his more natural midfield position.