I myself happen to have a man crush on Felix Jones, which means two things: 1) take what I say with a grain of salt. And 2) I'm probably wrong, always happens that way.
Anyhow, I think he's in for a good season, great? Probably not. RB3 with RB2 potential? I think so. All the talk out of camp is positive. He's running great, his routes out of the backfield are better, his pass blocking is better, and he's put up some decent numbers in the preseason - including a long pass play on a drive that he finished off with a short TD run. It's those long plays that are so enticing to me, he's the definition of explosive and Dallas has made it a priority to set him up for those plays, especially since they seem to be impressed by what he's doing in the passing game, so a thumbs up in ppr leagues. I've marked him as a guy that I definitely wanna grab if he starts to fall in drafts a little bit, probably won't happen, but if I get the opportunity at the right value, I try to take a shot at him. Just my .02.