I really think getting Mcclain would be the answer. He has great lateral movement. Above average speed and very good at getting depth in coverage. He has good instincts, strong at the point of attack and a very good tackler. The reason I say this is because he is very capable of playing all four LB positions. With Dansby, Crowder, Wake, and maybe JT, McClain will have that chance to develop and still be an impact on every down he plays.
While this is an intriguing possibility I hadn't thought about until you brought it up, I think we have added the ILB that makes us fairly solid there. He is a big improvement over Akin Ayodele. Would McClain be an improvement over Crowder? I don't know. He'd sure be a nice guy to sit in the wings and spell both of them occasionally, but that means using the #12 on him because he won't fall later. I tend to think with Dansby inked that something other than ILB gets used there. I admit the thought is suddenly interesting to me, but we just signed a NT who won't be here for half the year. We lost a guy who led the team in Sacks two years running, despite the baggage at OLB. We missed on Rolle, and I'm glad we did for the money he got, but FS is fairly thin.