I'm pretty sure he identified already that the Ravens were identifying things that he didn't do well or needed to work on. Seemed he just simply disagreed. The problem with Aiken is that I don't see a particular set of skills that he brings to the table that differentiates himself from his peers, and I think the league knows that.
Aiken's skill set was being sure handed on 3rd down and moving the chains, which he did when he played. His peers: Perriman- deep threat with no hands Wallace- deep threat who occasionally had no hands Ironically, his best shot for playing time would've come with this years Ravens since, with the departure of SSS, he would have had the surest hands on the team aside from getting one of the top 3 WR in the draft.
Aiken isn't better than Wallace or Perriman, and definitely wasn't better than SSS. I'm not sure that he is better than Campanaro if Camp can stay healthy. Here's what I remember from Aiken: He missed a great opportunity on a seam route against Pittsburgh (might have dropped it if I'm not mistaken) and I think it was the Raiders game where he dropped a 4th and 10 that Flacco put right in his chest. It was a difficult catch, but he was dropping that before he got hit. As people pointed out, he had a higher drop percentage than any of our WRs. If you want to play, stand out. He hasn't stood out. If he was so good, he would have gotten more than a 1 year prove it deal again. Could he have played this year? Yeah maybe. But we are also trying to improve, not continue to go 8-8.