There was no film on him. His plays come from backyard football and just extending stuff. Rarely sticking to the script and managing a drive. It's all or nothing with him and he doesnt seem to grasp the concept of the WCO. He can learn, sure but to say its all Kubiak is being narrow imo.
If Keenum has never been a WCO style QB, never showed an ability to run the WCO and the coaching staff will never adapt their gameplan to the skills of their roster, then why even take a guy who can't run the WCO?
If a coach is not flexible in terms of adapting the game plan to the strengths of the players on the roster, then they should not be signing players who don't fit in that rigid scheme.