To people who don't want a Safety, Thornhill, Savage, and Edwards have been on my radar literally all year as players Miami should target, because they're versatile DB's who make plays on the ball at a high rate. They can all cover in man or zone, and they all tackle. Even if you move Fitzpatrick to Safety, having another Safety with a versatile skillset is . . . a good thing. You should only draft DB's who excel in coverage.
Thornhill is a freak athlete who also played well at CB. Because of his playmaking ability and his athleticism, he has a very high ceiling. Because of both of the aforementioned and his versatility, he also has a high floor. He's one of the top 10-15 defenders that Miami should want in this class.