This feels like a classic let-down game. We pretty much handled our biggest rival on the road, and now we're facing an historically awful team that might be overlooked. Flacco is notorious for putting up some absolute stinkers on the road (although not necessarily against the Browns). And, perhaps most importantly, the Browns have a D-line that can give our less-talented OL some trouble (namely Alex Lewis and Skura), which is how the Bengals beat us.
I would be on the Browns +3.5 if I was a betting man.