After watching the end of season run in and the way that Rodri and Stones played I would say that he will share responsibilities with those two for running the midfield. I thought that neither played as a conventional 6 and they dovetailed perfectly getting forward or sitting back when necessary.
It's never just a straight forward starting 11 anymore. Rodri has been overplayed over the last two seasons and I thought he was running on empty in the two cup finals. Stones covered for him in the second half of the FA Cup final but he finally ran out out gas in Istanbul.
Knowing Pep he's probably already working on Rice's new role. Probably as fly keeper with Ederson getting forward more often.