You gotta stick Steve Johnson in there, he's been too good consistently this year to leave out. Plus, the Cleveland run defense is good and I expect Buffalo to have to pass more. Also, I think there's no way you sit Rivers, even if he's playing the 2000 Baltimore Ravens defense. Flacco is a good matchup play, but I think you're trying to out-think yourself there
Don't sit Rivers for Flacco, you just can't do it here...he's a premiere player in the league and 2 mediocre fantasy performances back to back don't change that. He also HAS TO perform against KC, and he will. I wouldn't start Flacco over a top 5 QB in the league.
Woodhead over (pierre?) Thomas
play Stevie Johnson, if you have to take out Wallace to do so, do it.