The situation has not changed despite the hope of Jones owners. They are enamoured and teased with his talent (as I have been at times) but part of this game is reading talent AND situation. Just like the Charles situation that I've avoided, i've avoided Jones this year. He MAY break out this year but the chances are much greater IMO of the situation staying status quo where Barber gets the lionshare and Jones gets the change of pace. That will certainly be the case if Jones continues to look pedestrian. The ONLY shot he has to take the reigns is if he is clearly the better RB which to date he hasn't been.the world.

I'd add that he also needs an injury to Barber to have a more prominent role. A lot of people keep pointing to late last season when Jones shined as a reason why the Cowboys need to feature him more and why Jones is worth holding or trading for in fantasy leagues. They ignore the fact that Barber wasn't 100% then and that's one of the main reasons why Jones' role grew.
It's one thing to be enamored with Jones' talent. I admit that I think he is a talented RB. It's also one thing to say the Cowboys should feature him more because Barber isn't a big-play threat. That may be true. But what fantasy owners need to do in my opinion is weigh those factors against his defined role. And right now, his role is to get 5-7 carries and maybe a catch or two every few games. He is not someone the team wants to give double-digit carries to, he is not someone who gets the ball near the goal line, he is not featured in the passing game and he is not getting the ball if the team is playing from the front (it was all Barber and Choice last Sunday against Houston). When you put all of those factors together, in my opinion it's very difficult to sit here and envision a more prominent role for Jones barring an injury to Barber. I see a lot of other sites saying the Cowboys should get Jones the ball more while ignoring what has transpired in the first three games.
Through three games I would ask anyone to produce a single shred of evidence which suggests the Cowboys want to give Jones the ball more. I've watched all three Dallas games and I haven't seen any signs that is something the coaching staff intends to do. So saying they should do it is fine. But ignoring what they are actually doing is something Jones owners shouldn't be so quick to do in my opinion.
If you're a Jones owner in a larger league and have the roster spot to spare he's worth holding onto in the event Barber gets hurt and his role expands.
But if you own him in a smaller league or one with tight roster limits and there are productive players on the WW, I'm not sure that holding onto him and hoping for an increased role that may never come (or at least one that currently shows no signs of happening) is the prudent move to make. There's no question he could go off later in the season. He has that type of talent. But how much longer can you afford to wait? That's really the question.