I like what TOtC said about Williams.
Winston just strikes me as not getting life. He has that Cutler thing, where the talent will entice, and the attitude will kill coaches. Mariota simply doesn't fit every coach. It isn't that he is a scheme fit or lack thereof, it is simply that most coaches lack the vision to get comfortable with freelancing, scrambling, called runs, and the general oh shit! oh yeah! nature of an athlete playing the position. NFL convention still espouses the field general mentality. What we see in Seattle is rare, and I will contend that the biggest failure in SF was trying to make a game changing athlete into a field general.
I don't think Tampa can take Mariota for that reason, Lovie is not a guy who can see the beauty of a little chaos behind center, nothing about that scenario matches a guy whose tampa 2 devotion (a defensive scheme all about control, not chaos) really defines him. But Lovie has been killed by Cutler once already, shame on him for taking Winston and thinking the same thing won't happen.