This may be an unpopular post, but hear me out.
Rex Ryan has only been a HC for 6 years in the NFL. Who is to say a HC can't improve after six years and become the franchise HC? Especially when he had 2 years at basically .500 as a Bill. I know he had 6 years to get the mental things down, the timeouts over the middle, the command of the team, but it was only his second year in Buffalo. I think we should've at least kept Rex as a bridge HC until we could find one better. I would hate to walk away from Rex and watch a guy like Rob Chudzinski go 4-12 if a rookie HC doesn't pan out. Let's face it, there just aren't many good NFL HC's out there and maybe if we improve the weapons around Rex, Rob stays healthy etc. he can really shine.