You rank them behind the players who don't have a lot to prove. So the ranking looks fair and the questions surrounding the OL just reinforce it.
Now if you were to rank the backfields based on upside/talent, I would think the Rams fare much better. They have two second round picks heading this group with one of them being an outside zone and change of pace back (Hendy) and the other a more well-rounded back who also should do well all around (Akers). And as much as I don't trust Brown to stay healthy I'd think he ranks quite well vs RB3s on other rosters so I'd guess our backfield is somewhere in that top third of the league in terms of talent.