Yes; he'll play.... How much is the question.
I think unless he can take some minutes from Gundoghan too then he risks being a bit-part player.
He'll take minutes from a few players. He's pretty versatile and Pep rotates plenty, with the amount of competitions City are in gametime won't be hard to come by.
Phillips is a good player. Much better than someone like Delph who fulfilled that HG pragmatic midfielder role before him.