This is a strange list to me. D'Angelo Russell looks pretty good to me (I'd rather have him than the #3 pick), Michael Kidd-Gilchrist wasn't really expected to develop into a scorer, and Dragan Bender is still 19 years old...
I'm an Isaac or bust guy, and I don't expect Isaac to develop into much of a scoring threat except at the perimeter. That's fine when you've got his combination of interior and perimeter defensive skills, as well as rebounding. A better defensive Serge Ibaka is the realistic upside. Barring freakish development, he's not gonna turn into a go-to, or even secondary option on offense however. That's fine.