I was carrying the baton for Pepe last year but whatever his treatment, he's not worth the heartache. There are fundamental flaws in his game, namely his touch, technical consistency and balance etc, that mean he's never really going to excel at a top club.
He should be kept more involved and should be used to give the likes of Saka and ESR a rest more frequently and generally played when he's in a patch of good form, but that's about as far as I'd go.