One mistake I think we all made was confusing the good play during pre-season against the two's, and when they looked bad against the 1's (both did often), we blew it off saying, "eh, it's because the Broncos D is so good."  Seems to me that there are a lot of good edge rushers out there, and when developing a new o-line, expect mediocre defenses to match up better against the QB's than they might otherwise.

Once again this year the offense is relatively new, as it was last year.  Maybe that sudden drop off is simply other teams getting film on this offense so they can plan against it?  Or, it might be worse that McCoy is just bad without an HOF QB.