What underrated recruit (3-star or lower) has CJP recruited and developed that has given everyone this idea he is a great talent evaluator?

[teeball]

You are correct. There is no direct proof that he can make a 3 star a stud player yet. Given he has only had 2 years, I would say that is expected. I have seen the team start playing more as a team, which lends itself better to development. Iron sharpens iron, but that iron needs to be moulded into something that can actually be useful for sharpening.
Butch Jones just ran around with a sword he bought off eBay and told everyone he was a ninja.

Good one!