I think the change in Shane from Soph to Junior is a lot more than your average jump. I think it is more the system benefiting Shane's skill set than just coaching, but to imply that it is the jump every sophomore makes is ridiculous
That cannot be quantified at all, not even a little bit. That first sentence is something someone says that just affirms what they think and there is no way to rebut the statement. I didn't say anything about every anything, that being said name me 10 players who didn't improve as upperclassmen & I'll even spot you Will. I will also point out to you something that Trim has pointed out several times. Shane spent nearly the entire non con in oscar's doghouse last season and he turned to Shane because he had to. Shane has spent more of the last season and a half on oscar's crap list than he has otherwise.
There is not a place you can go to that will quantify the typical player growth between years, I'll give you that. But between his sophomore and junior seasons his eFG% went up 15% - which is absurd. I think this is because, as Rusty hinted at, he has benefited by playing the 4 and having matchups against bigger guys who struggle to get out and challenge the 3 pointer.
I wouldn't call it oscar's coaching because he didn't just make Shane that much better, he put him in better spots to succeed. At the same time, I think the system also hurt players like JO and caused undersized bigs like Gip to struggle at times last season.