Man, I don't know. My first thought is that there's no way to tell what Toni's real influence will be as the only guy he's previously coached was his nephew. I don't think there would be any value in saying, "Well look how Rafa turned out, therefore FAA will be a badass." But certainly Toni has watched one of the greatest of all time go through everything, from being a peon swinging a racket for the first time to his prime and all the bumps between, including some rough patches (e.g. 2015-16). So I don't think it hurts and can only really help, but in the end it really comes down to Felix - just like, in the end, it came down to Rafa, who would have succeeded regardless of his coach.