Hate to say it, but unless the D collapses down the stretch I think they bring Barry back next year.

They've done well in terms of scoring defense with a lot of starters hurt and a secondary consisting of who-dat's.

If they can him, who would they bring in? Evero? Staley? They run the same scheme... would be the same things. Maybe they play more 3DL or adjust faster, but a big chunk of the league currently runs Fangio stuff; it would just be more of the same.
Hiring Wink Martendale from the NYG would be problematic also, his scheme is aggressive but GB might not have the players for it. Not sure if Sean McDermott is on a hot seat. Saleh is probably safe bc Rodgers injury.

Gregg Williams is persona non grata in the NFL and Jim Schwartz is happy where he is.
I don't like Barry's performance overall but I'm not sure MLF is going to let him go for an unknown given their background, and if GB finishes top 12 in scoring D they will keep him.