And what has the return been?
Among Tight Ends this season:
Receptions: #1 (#2 among all players)
Receiving yards: #1
TD catches: #3
Kwesi traded his 2nd round pick for that level of production. I'm sorry, but it's not wrong to factor that into his overall grade as a GM, I'm not sure if it's because he was a Hawk, or what, but some people seem to want to deny that Hockenson has been something other than very, very good, and absolutely worth what they gave up. He might have faked an injury in the pre-season, but there's no denying that he's put it all out there when the games were for real.
As far as missed opportunities go, that's incredibly subjective. Every time a team chooses someone in the draft, they're passing on every other player that gets selected after them. It's very difficult to grade a player that a team had an opportunity to select but didn't, as there are all kinds of variables that might change things.