I think free agency is typically loaded with decent journeyman backups that started out as late round picks. Plus we got Keenum, who is a slightly above average journeyman backup / occasional starter.
What really bug me about the Mannion situation is the report I read saying he rarely practiced and usually ran the scout team. We know he got precious little playing time. Now Fish Snead are giving up on him?
As smart as Snead looked in trading the RGIII pick to Washington, I think he has basically made an equal number of mistakes to balance the books.