Stash, sorry to inject my opinion into this discussion, but if this TE can play, and is anything like Risen proclaims - I understand that leaves a lot of wiggle room - then drifting someone to learn from Witten until he leaves isn't a bad thing.
But understand this, if Rico Suave can be a real deal player, and the team added another guy who can cause disruption in the defensive backfield as well, that has to make this team better.
Hell, the Pats were trying to do that recently themselves. The idea of two players that can exploit the hash marks, makes the outside guys better.
Just a thought.