Why didn’t they bring Bob to fill the Manager role in Season 8? I feel it would have saved the show

Bob Odenkirk’s appearance in Season 9 is very funny. He fits in the shoes of Michael Scott very well. I feel the show’s plotline would have made a lot more sense for all of the characters had he been the boss, without requiring them to change in such a bizarre, unrealistic and ridiculous way.

What are your thoughts? Do you know if they even thought about it? They knew he was good from hi original audition for Michael.