Interesting article that Athlon does every year.
https://athlonsports.com/college-football/pac-12-coaches-talk-anonymously-about-conference-foes-2017
Colorado
“They caught people by surprise last year, but they may be even better offensively and they were already pretty good."
"Steven Montez opened some people’s eyes when Sefo (Liufau) got hurt and played very well in a difficult situation. It’s tough to come in as a backup when you’re not getting the first-team reps, and he was a redshirt freshman with no real experience so I think he’ll get better and better. He’ll turn it over a little bit, but he’ll make a ton of plays."
"Offensively, they run some unique sets, very multiple. They can use tempo in interesting ways, and they’ll throw in some motions, some bunches. They do some neat stuff."
"(Phillip) Lindsay isn’t a big guy at all, but he’s a war horse type guy. Just a very solid running back that they use in the quick passing game."
"Defensively, I think it hurts them to lose (coordinator) Jim Leavitt, especially to a team in the league, but D.J. Eliot is a really smart guy and will do a good job there."
"They’re going to be hurting up front a little bit with the guys they lost, so we’ll see how they reinvent themselves. They’ll definitely have to win games with their offense.”
https://athlonsports.com/college-football/pac-12-coaches-talk-anonymously-about-conference-foes-2017