Some of you act like football is purely black and white. Its not. There are many variables to the game. Many of which none of us fans are privy to. We don't know what the coach has told a player.
I tend to go with Occam's Razor on such matters. For me, personally, a RB who has been mediocre his entire professional and collegiate career being limited in vision and instincts makes more sense to me than a HC who has coached several Pro Bowl RB's, including one of the all time greats, instructing his RB to not hit cutback lanes ... especially when we have another RB on the roster who is hitting cutback lanes. I mean, you got Joe Morris who is a 5'6" slasher going to two Pro Bowls under Parcells. Curtis Martin is the all around back who is among the league's all time greats. Otis Anderson is this slow, heavy moving plodder, wins NFL Comeback player of the Year his first season under Parcells. Dave Megget who is this converted option QB who becomes one of the great nickel backs of all time who goes to two Pro Bowls ... but Parcells doesn't know what to do with the great and unique talents of Julius Jones? Okay.
Ever notice how there are some RB's who just seem to produce everywhere they go? Shaun Alexander broke Alabama's single game rushing record as a freshman. He then proceeds to break their all time records in yards and TD's over the course of his career. Then he goes to the NFL. After a year of sitting behind Ricky Watters he almost immediately becomes of the more productive runners in the NFL. He's one of those guys. Meanwhile, when including college, we've now been waiting for Julius' "breakout" season for upwards of 7 years now. There are some things you can set your clock to. One of them being NEXT year is going to be Julius' year. The second is, if it's not his year, then its someone else's fault.