It’s kind of hard to dislike Marvin Lewis. He seems like a good guy.
I like him too. I liked Fish as well for that matter.
IMO in today's NFL the head coach needs to be an expert on one side of the ball, able to hold down a top unit or at the least maximize talent on one side of the ball. Lewis just seems old and tired, and mediocre in terms of holding it down on defense. That defense is also why he hasn't won a playoff game in a bazillion tries, although unlike Fisher he at least gets into the playoffs.
Given how long Lewis has been in place I would have axed him, personally. I think the Bengals ownership has come a long way, and it's respectable how he values continuity, but it's time I think. Keeping him on probably has more to do with a fear of getting back into the coaching dice roll. I understand all that, but after fifteen seasons or whatever I think enough's enough, and it's time to get a bright mind in there that can elevate you on one side, then try to get the other side covered with a strong staff.