I don't think you can underestimate what the additions of Veldheer and Cooper are going to do to the quality of the line across the board. We don't need another lineman early.
Bucannon is a monster but I don't want a safety in round 1. Way to many good ones this year Bucannon, Loston,Dixon, Ward any of those guys in round 2 and I'm happy. You can get a really good safety in round 2 but your not going to get the quality pass rusher past round 1 either Ford or Ealy would make me happy.
But Bucannon is different than Loston and Ward, and better than Dixon. Bucannon is more of the big tough guy, enforcer type strong safety.
I wouldn't be too opposed to drafting Bucannon, but even Muench admits it would be a bit of a reach to take him at 20. His value is much better in the second round, since he could easily just be a run down thumper type. He does show some ability to make plays in coverage, but I'm not sure he'll be very good at it in the NFL. He certainly should be better than Bell at it even in his first year (Bell mostly stunk in coverage).
Niklas is my favorite post round one tight end. I like him much better than Fiedorwicz, he jumps out at me more on film. Very good blocker, has a great feel for the passing game, even though he's not a natural receiver. At worst, I see him as Anthony Fasano; at best he could be Mark Bavarro. He's just so tough and physical, he would probably be the best blocker at TE that the Cardinals have had in many years. On run downs, he's like having an extra lineman. I really tried to like Fiedorwicz, but when I watched their film side by side, Niklas is better.
Marcus Smith is closer to what I want out of an OLB, but I think he won't have much of an impact in year one. He's a bit too lean for my taste; he looks like he'll need a year of strength training to make it in the NFL. While he's able to bend the corner (a trait that only Abraham has amongst our OLBs), he looks a bit stiff at times.
A guy who really jumps out at me and he's more of a guy I want later than round three considering we already have Minter, is Christian Jones, LB FSU. He looks like he could do a bang up job as a playmaker ILB in our scheme, ala Karlos Dansby. He looks a bit smallish, but I love the way he moves and he seems like he can make plays in the passing game.