No surprise he has one of his better games against Burnley. He likes playing against them as much as the Goat did.
I think the new system suits him a lot better, he drops into the defence as he was doing beforehand but now that's what is being asked of him, his mobility issues are less of a concern this way and with cancelo/zinchenko in midfield as well as stones taking up the responsibility of starting attacks and not having everything go through him anymore it negates his glaring weaknesses well.
Long term I want to see him replaced with somebody more mobile but Peps done very well to find a way to make it work with the changes he's made and for now it's working well.