The criticism of the Bears (Oline, QB, et all) is valid. I just think that the difference between an 8 win team and a 6 or 10 win team isn't all that much. A few plays here or there. I wouldn't expect them to be a playoff team, but I don't think it's out of the question.
Get marginally better QB play (from last year) and a bit more TO luck and you can win a couple more games. And no, I don't expect the Bears to have 36 TOs again, but there's a wide range between that and the 19 they got last year (only 9 teams had less).
On the other hand the OL is what scares me the most and has a chance to kill the season.