Your team looks solid to me. Britt and Ridley are your bubble guys IMO. Take it from someone who owned Law Firm the past two years, it's a pain to try and figure out when to play a Patriots running back. Britt got arrested for like the 8th time this offseason. He's talented, but troubled and hard to rely on.
The one thing I'd worry about with your lineup is that every one of your W/Rs except Mathews is in a significant time share situation or the second option on their team--and Mathews is currently injured and will miss the first few weeks. It's going to be trickt to figure out when to play who.