Overall, Moulds was probably the most physically gifted WR that I've ever seen on the Bills. Someone used the word "complete" earlier and that definitely comes to mind with guys like him.
If I hear scouts or analysts say "a guy that big shouldn't be that fast", then those are my kinds of players regardless of position. Not every guy with a rare combination of size and speed will put it together and dominate on the field... but the ones that do always become a kind of next-level dominant.