I can see both sides of the argument.
There is no doubt about it that Alves has been a world class full back who understands Peps system and had a very good champions league campaign.
Equally there is no doubt about it that he is getting to an age where fall offs in performance can be expected and are significant. Players appear to be able to keep going a bit older in the Italian league and CL than the PL in my view. Evra looked washed up at Utd but subsequently played well at Juve and in the CL(and Internationally). Vieira although he contributed on his return looked a shadow of his former self.