Yep, Stones has stank the place out when Pep's tried him there. I think watching the journey Rodri's been on and how Gundogan doesn't excel there shows how difficult it can be to play there in Pep's system(s)
Gundogan did excel there in 2019 when Fernandinho injured himself in February and we had to rely on Gundogan at DM to beat Liverpool to the title. We conceded fewer goals with Gundogan than with Fernandinho, he was that good.