Wow, that's insane. Congrats on getting him that late. Now just hope he can stay healthy!
This is a very good team for a 14-team league, particularly given your pick. I love your backs, your quarterback, and your starting WR. I think your WR depth leaves a bit to be desired. Austin is solid, but he's Dallas' distant third option behind Dez and Witten. If Britt plays to his abilities you'll be in much better shape, but he's very much a wild card and his QB situation is less than ideal. They're both serviceable bye week fill-ins, Austin more than Britt, but you may be in a tight spot if Brown or Garcon goes down. I love Sudfeld at TE, although not necessarily as a starter (at this point). That said, I'd start him over Pettigrew--a guy who's solid but isn't going to wow you. K and DST are fine.
Would be interested to see your leaguemates' rosters, but I'd be surprised if anyone had your RB depth beat. I think you're a playoff team for sure. If I were you, I'd try to package Vereen or Tate with one of your upside-pick receivers like Randle or Sanu, or maybe with Pettigrew. Try to upgrade at TE, although keep Sudfeld if you can.
EDIT--Here's mine: http://www.fantasyfootballcafe.com/forums/viewtopic.php?t=536203