I need to know if this is PPR before deciding. I see Graham as being huge in ppr this year. And I think your RBs Sproles, BJGE, and Benson will be solid in ppr format. So, I don't make this trade if ppr.
If this is a standard format it is a little trickier because you have 4 RBs who are all lower tier guys. I think JCharles is an upgrade and you have Olsen as a solid replacement TE (FYI never draft 2 TEs or 2 Def). I think JCHarles is a significant upgrade from what you got in a standard format. Floyd is irrelevant, and you have a serviceable TE replacement. The big question is what to make over the Chiefs and Charles this year. I just posted on another thread I wouldn't be surprised if he finished top 5, or outside of top 30. So, I think I would stay away from this trade in standard format, but it is a little bit closer.