The way I look at it...
If you pull the trade you have a better team, but you will most likely fall to 3-4.
If you don't pull the trade you have a worse team, and you still probably lose and fall to 3-4.
With MJD, Sims-Walker, Julius Jones on bye. Mendenhall has a bad match-up anyway, and will probably only get 5 or 6 points, and you will gain points this week with your TE