I'm not sure what you are trying to argue here, because it seems the focus of the thread has shifted throughout. Calvin Johnson, this year, has underachiever. Previous to this year, he has had very little help. Last year Calvin had a rookie qb, rookie tight end, and absolutely nothing on the other side of the field to take any pressure off of him. I agree that Calvin needs to work on separating from DBs, but when there is always a safety over top plus the other teams best cb guarding you it makes things harder.
Calvin is a top 15 receiver and I don't think that's arguable. Randy moss, Reggie Wayne, andre johnson, Larry Fitzgerald are the only guys I would clearly put ahead of him. Miles Austin, Brandon Marshall, Roddy white, Greg Jennings are all around the same tier as Calvin Johnson.