Speaking of developing offensive players. By now, everyone knows Will Fuller is injury prone and there is a noticeable decline in scoring when he's out. Neither O'Brien or his coaching staff have figured out the adjustments needed to minimize the impact when Fuller is either out or playing while he is physically limited.
I think everyone can agree that Fuller is more talented than Kevin Walter. Yet, Kubiak was able to get similar production from Walter. Every TE on the current roster is probably more gifted athletically than Owen Daniels. Are they as productive?
Say what you want about Kubiak. When it comes to the offensive skill players, he did more with less and because of his confidence in his system, he was able to spend more resources on defense instead of his offense. O'Brien is doing the opposite.