The replacement of the old guard is taking place, former captains Walker and KDB are out, but it need not be total. You need continuity to preserve the culture of success and winning mentality. I'm not against letting, say, Gundo go. I'm questioning the conviction of some posters that Pep doesn't understand what needs to be done, that is, that we need to replace more of the older players.
There's no fixed rule how to find balance between youth and experience in building a team, but there must be balance. Also, intelligence is key. One of the reason why many fans were sceptical about Gundo and Rodri several years ago was that they couldn't appreciate their intelligence due to overrating pace and aggressiveness. Legs are not enough to make it at the highest level. The head controls everything.