If a fighter amasses enough solid/good wins he can and should be given the P4P mantle. It's true, there is a dearth of top-level talent in some of the divisions he can compete in, but, there are a decent number of good and quality opponents. If he's active, fights often and wins impressively like he did on Saturday he could take the top spot.
Rigo got pounded by Marroquin. Mares is going to kill him. So we're not going to have to worry about this question.
If he can defend against lsc and then move up and beat Garcia, John and Mares he would be a lock for top3. If I'm being honest though I think he's too small at feather and we could see another Segura v Calderon situation were the guy has mad skills but is just too small. And no way could he move further and take the likes of gamboa and Uchiyama. Not gonna happen.