Like others have mentioned, I don't think it matters much how well he performs this year (assuming he achieves at least a baseline level of competence, as Moreno did last year). In this offense, he will produce, regardless of the level of his on field performance. As long as Manning, Julius Thomas, Demaryius Thomas, etc... are producing, Ball will manage to fall backwards into stats regardless of how he actually plays. In addition to that, above all else, the Broncos appear to value the ability to protect Peyton Manning from their running back. All other performance indicators seem to run a distant second to blitz pickup and pass protection. This was the reason that Moreno played so extensively during the first half of the year last season, despite some troubling metrics (as Adam mentioned earlier) and is also the reason it took Ball so long to carve out any kind of meaningful role (rookie running backs tend to struggle the most with learning blitz pickups, protections, etc...)
It seems crystal clear to me that this coaching staff feels Ball is BY FAR the safest bet for pass protection out of their current roster of running backs. He was on the field a huge portion of the time last night and appeared to only leave when he was winded or needed a break. The fact that he appeared to be on the field as much or more than true elite level stars such as Peterson and McCoy despite an obvious disparity in talent between them is an indication of the Broncos belief in his pass protection. Some might be concerned by the fact that the Broncos slowly lowered Moreno's workload last season as his stats continued to dip to pedestrian levels. However, unlike 2013, there is no running back on the roster that can challenge the starter's talent level. Last year, Moreno and Ball were comparable talents, in my opinion, so once Ball got up to speed with his ability to pass protect, the Broncos had no problem inserting him into the lineup as there was no noticable dropoff. Anyone who owned Moreno last year knew Ball loomed as an eventual problem to his workload as the season wore on. There is no such concern with any current backup on the Broncos roster this season, as I feel all are clearly inferior options to Ball. Even if you are of the belief that Ball is a below average player, that only makes Anderson and Hillman worse than below average, so it's a moot point. In this season, Ball has the best talent level of the bunch, regardless of what that talent level actually is, so even if the Broncos become more comfortable with Anderson and/or Hillman as pass protectors, they have no impetus to play them with the kind of regularity it would take to threaten Ball's workload.
That being said, to me, I saw nothing to be overly optimistic about from a dynasty perspective last night. Ball looked generally ok, and broke tackles and fought for yards, but looked far from explosive. In short, he looked like a player that is capable of producing top 10 numbers when he is in an elite situation, but not like a guy who can do that when in a less ideal situation. Due to his age, I believe there is still a window to sell very high in dynasty leagues, as there are plenty of people who think differently. I am of the belief that once Manning calls it quits. Ball is in for a very sharp decline in performance. Considering that could come as soon as 2015, given Manning's age, I have a hard time believing in Ball as a top 10 RB and feel the first half of 2014 presents a prime sell high window on Ball to obtain a true difference maker (although the opportunity to net someone like Le'Veon Bell or Giovanni Bernard, which may have been there prior to the season beginning, may have left already with their performances in week 1).