I think Isaac and Olson were retained for helping keeping roster together after Bubba retired. This year may have been the year see if he stays permanently. After the second half collapse offense this season, I am hoping Issac has applied for some D2 or FCS head coaching (I think that is his goal to be a HC). If that happens Olson would probably go to. If so, I think our TE coach will get promoted, and Schmidt brings in an OL coach and QB coach next year.
If no change, I am certain there will be some changes with scheme or offensive approach. Schmidt said coaches/players are held accountable, Schmidt is an ultra competitor, something will have to change on offense.
Bad games happen (NDSU showed that today) string of games like we had, then there needs to be adjustments on what you are scheming or utilizing players.
I am babbling so I better stop.