I don't see the comparison between Nik and Klay in college except for the fact that they both played SG and they were great shooters in college. I'm really exhausted by their comparisons Bajaden. Klay was a much more dominant player for WSU than Nik was at Mich. I think that's one of the biggest difference between the two players.
Nik hasn't played well so far this year - nobody is disputing that. But trying to compare Nik's final season in college straight up with Klay's just doesn't work.
Did Klay have a "more dominant scoring role"? Yes! But look at his team and his teammates. Klay played at Washington State - a perennial doormat of Pac-10/12 basketball on a team that went .500 in conference, finishing sixth out of ten and not getting invited to the NCAA tournament. Other standout players on Washington State that year included Brock Motum (extra credit if you know what position he played) and nobody else I can ever even remember hearing of despite the fact that I watched the Pac-10 that season.
Nik played his final season for a Michigan team that won the Big Ten, got a #2 seed in the NCAA tournament, and got to the Elite Eight before losing to Kentucky. On this team, Nik had to compete for shots with not only two fellow 2014 draftees (Mitch McGary #21; Glenn Robinson #40) but also a presumptive 2015 lottery pick in Caris LeVert.
The role that Nik was asked to play on a great Michigan team was not even remotely close to the role Klay was asked to play on an NIT Washington State team. Though I will give you that - Klay Thompson is the only reason Washington State made the NIT that year.
I don't know where you get the notion that Nik is athletic. If you're 6'6, you should be able to dunk as a NBA player. Nik is not atheltic by any means and it's the biggest knock on him. Not only is he not athletic, he lacks any type of speed whether it's foot speed, lateral quickness, foot speed, or etc. He struggled a lot against bigger and more athletic defenders because he couldn't shake defenders off of him.
Nik is able to dunk - in NBA games, no less. Perhaps you've missed it, but he's done it several times, not just on the break but on baseline drives as well. Nik is far more athletic than he gets credit for. Athleticism is clearly not his dominant trait, but given his shooting (what we expect it to be, that is) his athleticism is certainly sufficient to keep him in the game. Don't assign Jimmer's faults to Nik - they're not the same person.