Braet needed to be retained for at least this year. They need him recruiting during this transition. They'll be able to better evaluate him over the next year. OC options between both staffs look bad and I would hope for fresh blood there. I think Seiler has a lot of potential but Klieman is a defense guy. Maybe he ends up Co-DC with a Klieman guy.
I'm not against Sean coming back if he is exclusively focused on special teams. I think he had a bunch of stuff on his plate managing the program beyond special teams that negatively affected his unit. Of course, that should be Klieman's choice.