I was very high on Adnan. And I was very high on Adnan because he was motm in nearly every reserve match I watched. I wasn't that high on Adnan when Adnan switched his style of play into more of a dribbler as opposed to what made him shine in the reserves. His maturity on the pitch is what made me believe in him and he increasingly became more one track minded under Moyes.
Still, I don't think it's some negative to have believed in Adnan. He's doing well in La Liga right now, albeit he dealt with injury problems. A lot of us are getting more experienced at figuring out what can translate and what won't after seeing these youth matches. James Wilson was a big lesson for us because although he had a nice scoring record (with nice solo goals), his overall ability wasn't great like Mason's is. We can compare scoring stats at that level to those who have made it like Dembele, Tammy Abraham, Rossi, etc... and we can compare how great they were to players like Suso, Januzaj, and Rony Lopes.
I would be in favor of creating some database of United's top 30 prospects list for those of us into youth football. Something similar to baseball like this
http://m.mlb.com/prospects/2019?list=la
Each player could be graded based on technique, pace, decision making, etc...