I think Moore is an UFA after the season and with the money now tied up at the position in Minny, I forsee a great landing place for him: Philly. Andy Reid has wanted a Westbrook clone/backup for years, hence the high pick spent on to-date bust Ryan Moats. Hunt is obviously a recently aquired impediment but he is def more similar to Buckhalter (although he is supposed to catch well). If you play in a PPR league (and Moore is indeed a FA next year - or if he's cut this year) he would be a good guy to stash on a deep roster. I think he would flourish in Philly and would be gold if Westbrook went down for any length of time.
I think Fason is a pretty-good, second-tier NFL feature back. If he's starting, he'll be one of the worst NFl starters. But, he has enough game to warrant a look as a career backup type who can get you through some stretches should your starter go down. If he's your starter for any length of time, I think he's a guy you'll always look to replace. I think he's probably similarly talented to a lot of guys who will garner a lot of carries this year in the NFL. The situations in New York (Giants), Green Bay, Tenn, Oakland, and Houston come to mind.