without getting into detailed analysis, I think Ball will be pretty close to what Moreno was last year with potentially more TD upside.
250 carries at 4.5= 1,125/10 TD's
50 receptions at 8.5 ypr= 425/2 TD's
277 FF points in PPR leagues puts him at RB6 last year behind Lynch & Moreno and in front of Murray, Peterson, Lacy.
This is a very reasonable projection. And as I look at last year's top 10 and top 5 in my PPR league, I expect Moreno, Reggie Bush, and Lynch to decline. Moreno for obvious reasons. Bush I think is 29 now and I think Joique pushes him for PT. Lynch is 28, Christine Michael is having a good camp, so I expect Michael to get more attempts too--Lynch will still be the lead dog but it will be more of a RBBC. Another top guy, Demarco Murray, I really like, but he has been injury prone so I wouldn't be surprised to see him fall although short of injury I expect him to be right in the top 5 mix again.
Basically, when I look at this I see two guys, Lacy and Leveon Bell as the only other guys who could push up and replace the people I mention above and get into that top 5 area. Lacy has the talent but Leveon doesn't IMO. I wouldn't be surprised if Lacy does but I also wouldn't be surprised to see GB use him in more of a RBBC than Ball will experience in Denver.
If Ball doesn't get hurt, it is hard to see him not being at least top 8 and possibly as high as RB5. I would put Lacy in the same tier with the same expectations. And I would drop Moreno out of the top 30 and Bush out of the top 10 and Lynch down to the RB8.