The only thing that bothers me is the fact that by all accounts Winslow was productive last pre-season, so much so that the Seattle media and faithful were shocked when he was cut. Dallas Clark on the other hand was really a non-issue in the Bucs' offense, so much so that the Bucs haven't shown any interest in bringing him back. That being said, I would take Winslow.
He was released, reportedly at his request by the Patriots in late September of last year.
All the other teams across the league had opportunity to sign him at any point in remainder of the season. None did.
With that in mind, I'm not that worried that were missing out on anything.