Here's what Field Gulls said about the pick:
Nevis was one of the most disruptive defensive tackles in the SEC in 2010, leading LSU with 56 tackles, 13 for a loss, six sacks, three forced fumbles, four QB hurries, and an interception in 13 games. He's extremely strong - he squats 535 and benches 475 - and combined with his quick initial burst and ability to disengage blocks, he'll make an immediate impact for the Hawks. With Colin Cole or Brandon Mebane playing next to him at one-tech and Red Bryant returning to the five-tech DE position, he'll draw a lot of one-on-one matchups. His quickness, lateral agility, and hand strength will be put to good use, and he'll be effective in putting pressure on the opposing QB.
If he was disruptive in the best conference in college football then I imagine he has a shot at being disruptive in the NFL. I like his size, his experience and his ability to penetrate the offensive line. This is a solid pick by the Seahawks.
For the full explanation of the pick, check out Mocking The Draft.