McCaffrey's being on the 53 will probably come down to how many WR's the Packers keep.
I think these 5 are now locks: Nelson, Adams, Cobb, Allison, Davis.
Unless TT surprises us and trades one of those 5, the 6th spot is probably going to Janis. Davis is the only guy of the 5 that I would be OK with trading and he probably isn't worth much. I doubt they expose McCaffery to the waiver wire in week 2, by holding him for week 1 due to Allison's suspension and then trying to get him on the PS in week 2. If they aren't keeping 7 WR's and McCaffery isn't the #6, I would prefer seeing him cut in the next 24 hrs. in the hopes with 1000+ other FA's, he is barely noticed and can be resigned to the PS.