Chung and Arrington are the worst starters for the Patriots right now. However, I think the coaches are making the right call with Dowling. Don't be misled by his size, speed, and athleticism. He can't swivel the hips very well at all.
The wrong call, obviously, was drafting him the first guy in the second round a couple of years ago when other guys were there. I am not going to mention Torrey Smith's name, either.
I am wondering what the Patriots would be like if Mark Barron could be put on this team. I know he was out of reach, but he's a difference maker at a position the Patriots desperately need such a player.