I think that depends on how the team plays. Had the team not gone on a win streak and finished strong this year, I'd be willing to bet Flus would have been fired.
As for Poles, I do recall that there was A LOT of talk last year about how Poles "inherited" Fields and hasn't gotten to chose his QB since coming to CHI. Without getting into a long discussion about the importance of QB vs building a team, I have to believe that if Poles drafts a rookie QB and he has a season like Stroud but the team doesn't make the playoffs next year, Poles is plenty safe.