I'm a big believer in Stevenson been saying he's a future top P4P fighter before he won a title but no, beating Valdez on top of what he's done right now wouldn't put him in my top 10 P4P. He needs to do more. I prefer to base rankings on achievements not potential otherwise you get situations like when Adrien Broner was ranked number 6 on the P4P rankings.
The Ring Magazine's #10 is four-weight champ Ioka and #9 is four-weight champ and former P4P#1 Chocolate Tito.
Well Shakur is already towards the bottom of my top 10 list so a win here would cement his standing. If he loses, he'll be taken off. If Valdez wins he probably won't enter my list regardless tbh.
P4P is a body of work, not a single win. Valdez is not and was never seen as a future P4P monster w/ a high ceiling.