Here's probably the only metric that matters:
2014: CU won 2 games and score differential was -10.5 per game.
2015: CU won 4 games and score differential was -6.9 per game.
34% improvement (10% improvement in score differential in conference play).
I omitted the Nichols State game for obvious reasons, for comparison.
2015 replaced Cal and UW with Stanford and WSU. Everyone thought it may have gotten easier, but 2015 was tougher since the 2015 editions of Stanford and WSU were much better than the 2014 editions of Cal and UW. (Cal couldn't stop anyone and UW couldn't score in 2014).
We lost to USC by 3. In 2012, we lost by 44.
UCLA since we joined we've lost by 39, 28, 22, 3 (OT), 4 and that was in the Rose Bowl.
When I go back to SoCal, the same folks who used to laugh at me for being a Colorado fan now worry that we're coming up.
I know, he's being paid to win. Fire him!