Well look at Demaryius Thomas last year. People liked his potential, and granted he was ranked behind Dez as no. 2 by enough services, but no one saw him going at 22. Then the Broncos swoop in and grab him because they like him. This was a guy that had an ankle injury and didn't attend the combine.
While I think it would have been a better move to come back, I'm not naive enough to think I know what is best for Michael Floyd. If he thinks he should go then he should go--I wish him the best of luck.
It is a heavy year with wide outs so hopefully he'll be able to have a terrific combine and climb the rankings. He's not going to blow anyone away with his forty time, so he'll have to display all the other skills he has. He is a great wide out, and he deserves to be up there with all of these other guys coming out, it just boils down to his injuries.
Who knows, maybe someone will love him like the Broncos loved Thomas. I doubt it, but it's possible. Wide Receivers are too plentiful.