I would absolutely do this.....
Roddy is great and your WR corp would take a hit but you still would have Housh, Roy and Royal.....I have Royal as well but not giving up hope on him and he should (according to some experts I have read) say he will turn it around!
You have a shoddy RB corp though and Portis will be a huge addition so I think this would be an all around fit for you. (Plus I LOVE the Jet's Def this season)
I would pull the trigger on the trade!
Standard H2H 12 Team 1 Pt PPR, Start 1QB, 2RB, 2WR, 1 FLEX (RB/WR/TE), 1TE, 1K, 1 DEF