Actually he is. Falling to nepotism is the definition of stupid.
I don't think he'll want to veto any of the old players being forced to leave. It's a stretch to call it nepotism with Alba, Busi, Vidal etc.
Maybe Suarez but as I said he doesn't have a clear replacement so should be safe from leaving.
Who has Messi stopped from leaving? The club has never showed intention of selling the Amigos. Not until now.