I am very excited about the two LB commitments without a doubt, but I feel that Johnson will play before Mitchell does. I think he is a more fundamentally sound and quicker player. Mitchell is a physical specimen, but his technique needs some more polishing than Johnson's IMHO. I actually hope that neither of them are needed in 2013 and they can both grow into real high level college football players.
With Perry, Williams, Perkins, Roberts, and now Johnson and Mitchell the young LB corp is looking good. Exciting times indeed.