Cook for Sanders Trade Advice

I was offered Dalvin Cook for Emmanuel Sanders in a 10 team PPR league. This seems like a good trade to me except that my RBs (Gurley, McCaffrey, Collins, Burkhead, and Lindsay) are much deeper than my WRs (Sanders, Green, Woods, Cooper, Goodwin, and Locket). Do I accept and try to shop one of my RBs for another WR? Or should I keep my roster how it is?