With Pep's selections:
Laporte is a more refined defender than Danilo (for anyone thinking he should start) with his positioning so even with the issue of him plausibly getting beat for pace, Laporte has that skill as well as a track record of being good against pacey wingers and making recovery tackles.
I think in his first game for us we saw a bit of this.
I also wonder if we see real problems defending on the left wing, that if KDB is on the right wing (as I forgot where he played in the Carabao cup final), that Pep can put KDB on that side for better cover compared to Sane.
I thought Bernardo would start if Raz did not, but I think I can see the benefits of cover for the defence with Gundogan instead of Bernardo.