Clearly there are major problems with the offensive line. As you pointed out, Lamar barely has time to get the ball off and he knows harassment is coming on each and every pass play whether the opponent blitzes or not. In fact, that's the killer on both lines: the offense struggles to contain a 4 man rush and the defense can't generate a 4 man rush. I think the personnel are the problem as well as the O-line coach. Faalele and Vorhees just don't seem to have 'it' and the D-line, not quite as bad, misses Madds. Our Edge Rushers may be improving, especially with Dre'Mont who showed promise and our second round pick who seems to get a little better each week, but the interior rush is non-existent. Of course, the first priority for the interior lineman on the D line is run containment and they've done pretty well with that.
As for Cleveland....good defense and new offense is going to mean we just can't steamroll them, but we ought to be able to beat the Browns and improve to .500 while, hopefully, the Steelers keep losing as they get into the meat of their schedule.