To me, I look at what areas CU has improved, stayed the same or gotten worse since they handily beat Hawaii last year.
Defense - The worst CU defense in recent memory (maybe history??) held Hawaii to 12 points. To think that we made a big time upgrade at the DC position, have a veteran laden defense in '15, and some solid additions from JUCO guys, I don't see why our defense should have any reason to "fear" Hawaii's offense.
Offense - The offense has shown that they are the strength of this team by getting markedly better in each of Mac/Lindgren's 2 seasons. With a veteran QB, a very good group of WRs, and an experienced OL and RBs, I can't see any reason to believe that a mediocre to bad Hawaii defense in 2014, who is learning a brand new scheme under a new, unknown DC, will slow us down enough for their even worse offense from 2014 to keep them in it.
Obviously, those takes are from 2014, but it seems to me that the only real, tangible reason why CU fans are skeptical (some even predicting a loss), is because it's an Away game. I know Hawaii is a tough game on the islands, but I feel as if some people are acting like we're walking into The Shoe to play Ohio State or something. CU has be so bad on the road over the past decade, but consider the overall state of the program during that stretch. Hawaii went 3-4 at home last year, so to use the Buff's road performance history as the only reason to predict a loss or not be confident is a little dramatic, IMO.