First, I want to be clear that I'm not knocking Andre Hollins - he's going to be very good. He just happens to be a good comparison for a number of reasons (including the praise that he receives for his 2011-12 performance from some people). The point is that Julian Welch was a lot better than most people give him credit for.
Not avoid the true shooting percentage - I don't refer to it often, nothing to do with these two players - but, the numbers are 59.9% for Welch (best on the team excl Mbakwe), Andre was 55.4% (behind Welch, Rodney, Austin Hollins.. all the guys that played more than him).
Again, I think Dre going forward can be a great story - and with the very high number of games Minnesota played, you could see him dealing well with increased usage. So, if you're talking about what he means to the future, etc.. sure, go ahead and weight based on his progress. That makes complete sense. However, as you say, Julian had a better overall year.
(If you look at the 4 NIT victories, Andre Hollins shot 50.0% eFG and had an assist to turnover ratio of less than 1:1. Julian Welch shot 64.7% eFG and had an assist to turnover ratio of 1:1... while banged up.)
Coming into 2012-13 the Gophers are in a much better/comfortable position with regard to who they can feel good about handling the point than they were last year. It's not a bad thing at all.. I'm just saying it's OK to show Welch a little respect.