There are a handful of guys in this draft that I feel would be an upgrade to Ervin that the Packers can get.
Amari Rodgers, WR, Clemson (not sure Packers will spend the higher draft capital to get him) D'Wayne Eskeridge, WR, W. Michigan Kenneth Gainwell, RB, Memphis Javian Hawkins, RB, Louisville Jermar Jefferson, RB, Oregon State
Everyone of those guys return both punts and kicks
North Texas WR Jaelen Darden is going to some team as a KR/PR guys only...Packers won't take him because he doesn't fit their "catch radius" measurable. I think in terms of returns, he could be Tyreek Hill.
Hard to say...5 through 7, I would guess. Same for Chris Evans of Michigan, another high-RAS RB.
There's always a chance a running back-needy team will draft them earlier than that, but that's where I would take them. Note, these guys are probably more pure running backs, than jet sweep/kick returners. That said, we could still use a number 3.
If you guys want to look up RAS scores and grade players based on their pro days or Senior Bowl measurements, this is the place - just type in a first or last name, and it will filter the results for you...great site...