I appreciate what Poyer brings to the table but if we're being honest McD has had great defenses with no name safeties before, it's not an essential position in this scheme. Poyer functions well within this defense but the standalone pieces in the secondary are White and Hyde, the rest are interchangeable and can be replaced imo.
That said I would absolutely try to extend him. I want to keep everyone on the defense, but realistically not everyone is going to stay.