I like Warren and his versatility, but I have some concerns that he might not be quick enough, fast enough, or run good enough routes to get sufficient separation in the NFL. He looks like kind of a plodder when running, but he does run with power after the catch which is nice along with his size.
So I think that likely makes him a 2nd or 3rd round pick so I would not want to take him in the first especially given how high the Saints are likely to pick in the first. But he would seem like a good 2nd or 3rd round pick depending on how fast he really is and if his route running gets better.