The problem, your WRs have a lot of questions, IMO. There isn't a single WR of the 4 that has a track record of being consistent. Yes, MSW and Bowe aren't going to have horrible weeks like they did week 1 all the time. But, it's not like they play on passing teams. Everyone has hyped Floyd, but it's not like he has a history you can point to and say, that's why he'll be good this year. Maclin should be fine because the Eagles will throw it a lot. But there are also a lot of options in Philly.
If you make this deal, I think you need to turn a RB into an upgrade at WR.
12 Team League. We start 2 QBs and get .5 PPR, otherwise standard scoring
QBs: Stafford, Fitzpatrick, Collins
RBs: Charles, Mendenhall, Best, Starks, Carter, Karim
WRs: D. Jackson, Marshall, S. Smith, Green,
TE: Hernandez, Cook