ASJ has improved his blocking since he started at UW, but I'd say he's still a significant downgrade from Miller in that regard.
However, offensively the dude is loaded with the kind of skill set and athleticism that is prized in a TE. He'd make a wonderful receiving option for Wilson that would help give us one of the most dynamic offenses in the game. I'd approve this pick! (As long as we take some OL and DL guys in the later rounds.)