That is an oversimplification. And it's not mutually exclusive. An application in logic would serve one well here.
1.) Tomlin was head coach for that Denver game. He is supposed to have final say. Do you think Belichick wouldn't have observed the game plan was not working and change things up? Of course he would have. Even if his DC didn't see it that way, BB would intercede and alter the plan. I have heard him say so on more than one occasion. He has said that, during a game, when he sees his original plan isn't working, he changes it to something else, DURING the game. How Tomlin didn't see that game plan was horse shit and change it tells me he just was lost. Just imagine how hard it is to make Tebow look like a decent passer. That is indeed arduous. I don't care if your DC is a "genius" and a "legend." Your job, as head coach, is to make the final decisions, and they didn't alter their failed game plan in any way, even through OT.
2.) If Tomlin's input makes the D even worse, than that is also fail. The above is true, which does not invalidate point 2. They are not mutually exclusive. If the D remains anywhere near as horrific as we saw this preseason, there will be plenty of blame to go around. The HC does not get a pass if they can't get their act together. He is supposedly a defensive coach himself. He should be able to lead the team to decent play. If not, who do you want to blame? Pippi Longstocking?
