As others have noted, and this article makes clear, Freeman has many problems with his mechanics. His issues haven't all been due to the toxic environment in Tampa Bay. Interestingly enough he shares many of the same problems that Ponder has - inaccurate passes, pocket panicking, and questionable decision making.
But none of these issues seem as pronounced as what Ponder has shown us. Freeman - all be it three years ago - has shown a strong, elite quality passing game.
It seems like the challenge now for the Vikes is to help him clean up his mechanics - footwork, decisions, and the like, so Freeman can realize his potential.
I'm all for this decision and there is a chance that he could be our QBOF. Obviously suitors weren't lining up at his door once he was released so his "issues" are real. That being said, I think it was a smart move by Spielman with little downside. He'll be better than Ponder and Cassell given the strength of his arm so at worst we ride him until we find a better guy in the draft.