He looks like a defensive player to me. He's REALLY aggressive and flies to the ball. I like the play where he takes on the TE in the flat. A little high on the tackle but he went after it. He seems fearless, but he'll have to lower his level on tackling or else he'll be bouncing off some people.
I think the consensus on Mekhi was he is a step slow to be a high end receiver and seems like a natural and instinctive player at S. IMO he just needs a good offseason in the weight room. I can envision him as a key special teams guy next year.