because he's a local boy with lots of speed, we hoped he'd turn into some kind of fairy tale hero.
but he is what he is: a third running back and a kick returner who doesn't make a lot happen, but who doesn't make mistakes either.
now, that's not bad. you need guys like that. you need some special players, but there are so many other positions that are more important, i don't mind if our third running back and kick returner is just okay. (if our No. 1 receiver were just okay but our third running back and kick returner were special, i'd say something was wrong with the way the team was constructed.)
tyson's skill set has gotten him a great job for a few years, and it might keep him in the nfl for a few more. not a bad deal for him at all.
if someone better comes along, though, dallas will thank tyson very much for his efforts and send him on his way. (and we fans will all be happy to have something better.)
AND, if someone better were already on the squad, they'd be playing and tyson wouldn't. it's that simple.