I think people forget just how devastating the Brady-Moss connection was to opponents. In the history of the NFL, there has never been a duo to compare with 2007 Brady-Moss. It's not that I don't see the issue at DL (You can go back to the thread about the Shelton acquisition to see that I've been talking about this season's DL problems for a long time), it's that adding Moss would stress the Rams more than any other addition.
And I would put safety down at the bottom of the list of positions needing the helpful additions in this game, so Rodney isn't even a thought for me.