All he should do is to be focused, and ready for bigger fights. Do not take fights, like he did against Jorge Diaz on short notice .... He could still beat most of them and become champion ...
here is an example of a bad transitiom from amat. to pro he is very technical but my sister hits harder and he lacks stamina i had some expectations with him but at his age will be unlikely getting up to another level and im really sorry because he seems such a nice person