I'd say it was a very risky move by the front office at best.
Byrd's best year was his rookie season in '09 with a ton of INT's, but he ended that season on IR, but got nominated for the pro-bowl. He had solid years in '10-11, but he was hurt in 2012 and 2013 with limited play.

With his performance dropping off or non-existent for (now) 3 straight seasons tells me he has this one last chance to shine bright or we just wasted a bunch of money. A HUGE deal for a player who has barely seen the field. Really think we should have signed a d-lineman or o-linemen - for freaking 6-year $56 million contract. That's unreal for a player that hasn't produced the past couple of seasons.

I'm a little concerned.

He only missed 5 games in 5 years with the Bills and had 9 picks his last 2 seasons.

And he hasn't made the big money yet. If he crashes and burns he probably won't see very much of that money. His last 4 years are 32 million just in base salary. He'll restructure or he'll never see that money.