I like him a lot, but I never watched him play and thought "3rd rounder". If he goes that high, I say great, but guys like him go in the round 5-7 range every year.
He's a very similar player to the current version of Jermaine Kearse. We got Kearse in UDFA. I think Kearse's drop problem obviously played a big factor in him lasting so long. I think Abbrederis' pigment problem will probably hurt him in a similar way. White WRs are usually late round picks. There have been just a handful that have been drafted in the first three rounds in the last decade or so. No one will admit it, but race perceptions are still in play for a lot of GMs, at least for certain race-position combinations.
That said, if Seattle traded into the 3rd round and took Abbrederis there, I wouldn't complain. He's going to be a quality NFL WR on a cheap contract. And of course, he appeared to have immediate chemistry with Wilson at Wisconsin. To me, that kind of player is worth a 3rd round pick.