I don't know, man. Depends on what Vick does rest of way. If he can start and tap into that vast potential that he did earlier in teh season, there isn't a whole lot of difference between him and Schaub, IMO. Also, Brandon Lloyd has been great, but I don't expect him to continue at that pace. There are too many weapons in that offense that deserve attention, and as the season progresses, I fully expect Damaryius Thomas and Eric Decker to get more comfortable in the NFL and to see more action in the passing game. I would look to move Lloyd right now if I owned him more than anything else.
There is no reason for Shanny to mix Portis into the starting RB mix with Torain doing so well in the role and being a Shanny pet project from a long ways back. There is a good chance Portis has platyed his last down as a starter for the Skins. If your RB depth was stronger, or if you were sitting at a better record, I'd suggest doing the deal. However, considering your situation and the players involved, I think I'd stand still.