I understand the point about value, however, I think you guys are overthinking it a little bit. This roster needs a running back in Howard’s tier and currently doesn’t have one. This roster also has a really strong wide receiver corps and could stand the hit of losing Hill.
I’m actually not sold on Cook as the clearly better option, either. Yes, he has high upside, and currently a higher value, but that was a serious injury. RB’s haven’t thrived in offenses with Cousins at qb, and who knows what philosophy the new Vikings OC will have? If it resembles the system he helped build under Pederson in Philly, he won’t be leaning on a single back as much as Cook’s ADP value suggests.
Value in July fluctuates in the context of roster needs. It’s also often not a reflection of what will actually happen from September – January, so making moves based on value in July is risky business.