What an utterly bizarre thing to get worked up about. Why on earth do you care if a faceless person on an Internet forum overhypes a young footballer? You sound like a completely joyless individual, I bet you're hoping that Diaz and Sancho don't make it either.
The irony!
FYI, I think Diaz and Sancho are potentially great players. My worry with them as with every youngster is their mentality and physicality but they both have the ability to succeed. I just fear they won't get the required minutes and experience here with Sane, Sterling, Jesus, De Bruyne all playing in their positions and possibly Patrick Roberts in that mix as well. There is not enough football around for all of them so they will need to go out on loan to get that experience and i don't think the club will choose the right club or age for them.