KjSU was a top 15 weeks 3 and 4 of this season, and below after that. They went into the CU game at 17/18 IIRC. So, let's at least be accurate about that if you are going to throw a wall of stats at me.
KjSU really could not cover CU 4-7 WR's. They got pressure on SS2 because they could just pass rush. A semblance of a run game would have kept them on their heels and CU probably would have scored even more without SS2 having to face a DL with no run responsibility at all. There aren't many teams that can win by being one dimensional.
CU has way more talent. Just going toe to toe with KjSU is a pretty low bar for this CU team, even with 12 on the sideline for a half. If the game plan from UCF were employed, I think CU would have won easily. KjSU is a solid team, but I do not think they are that good, BYU throttled them and their two best wins are against a flailing Okie St. and AZ, neither of which are what their pre-season rankings forecasted.
CU has, IMO the best WR and DB rooms in the conference and the best QB to boot. The RB room is above average for the B12, but woefully underutilized. The LB and DL are at least average in the conference. The real achilles heel is the OL, but for reasons unknown to me, the staff chooses a game plan that makes it as hard as possible for the OL to succeed. The schemes used at UCF showed how that weak point could be neutralized, but it requires the team to run the ball.
So, playing schoolyard 7 on 7 is what lost the game. Ultimately, that is on the coaches. And it was a mess. CU's superior talent kept them in the game, the poor game plan lost it.