Situation is so important for RBs that a second tier talent could pretty easily have top value if he lands in a great opportunity. Right now guys like Jerick McKinnon, Eddie Lacy, Tre Mason, and CJ Anderson have weekly starting value. By and large, they weren't regarded as ELITE talents in their respective draft classes. If you get a "good" player in a great opportunity, you're going to see some nice production. This is a pretty deep RB class and someone like Artis-Payne, Abdullah, or Yeldon could be pretty valuable next year if he goes to a wide open situation in the 2nd-3rd round.
How many Johnathan Franklins does it take to make an Eddie Lacey?
I get the point you're making, but it's not just Franklin vs. Lacy. It's Franklin + whatever else you get in the trade vs. Lacy. It doesn't even have to be Franklin at all.
Immediate example that comes to mind, I had the 1.12 in 2013. I didn't think the value at that point in the draft was all that different from about then until 10-15 picks later. I was offered 2.12 and 3.1 and took it. I was a pick away from getting Ogletree + Alonso, but Alonso went right in front of me and I took Denard Robinson instead.
Everyone will look at every draft differently, but I see this year's draft a lot like I saw picks 10-27 or so in 2013. There are a few better bets than the rest, but the quality of the second tier is not only deep but it's strong too.
Similar story last year. I held pick 1.3 (would have been Evans or Hyde). I was offered 1.8 and 2.8 and I took the deal. Evans is doing very well and Hyde may be the lead guy next year. However, I may have two starters instead of just one as I took ODB and Davante Adams. I didn't know who was going to fall, but I felt like either ODB or Cooks would probably be there at 1.8 and that one of Adams, Moncrief, Robinson, etc. would be there at 2.8.
Perceived difference by the public and my own outlook is what drove those two trades. Public thought there was X difference, I thought it was Y, creating value from both my POV and my trading partner.