I honestly don't follow college basketball enough to have a sense how those young guys would translate to the NBA.
I do have a problem, in general, with going too young. Young players take a while to figure out how to win at the NBA level. If you throw too many of them out there at once, even if they are very talented individually, they struggle to win (like MIN - three 20 PPG scorers and a 9-19 record).
I get that they'd have Dame as their leader, but I'd be leery of starting two 20-year olds next to Harkless and Noel. I love Noel's defense and he's my number 1 realistic trade target, but he's not a leader, he needs to be led. Same with Mo. I love his improvement, but this is his first season as a full time starter and he's a pretty quiet guy. Not some wily vet that can show the 20-year olds the ropes.
I mentioned in another thread that my personal, somewhat realistic, somewhat wet, dream is to get Noel, Bogut and Ibaka without giving up C.J. That would improve our defense 100 fold without killing our offense. That gives us a 3-man front court rotation with one 22-year old defensive stud, one 27-year old stretch 4 who shoots .442 3FG and is also an elite rim protector and one 32-year old wily vet who is also a great space eating defender who can pass and sets the most effective (moving - cough, cough) screens in the league.
BNM