At worst he's Korbel Stewart.. at best he's maybe a notch above Mike Vick. I'm guessing he'll be a nice bye week/injury replacement type. . Nothing more
I view him as a guy who if he wins the starting job at some point, will likely be a guy who averages FF points on the lower end of the scale for QB(s) but has the potential a few times a year to bust out for 30+ points.
At this point I see no reason having him on roster unless it is a deep bench or a big league.