A new OC changes nothing this season. This is the offensive scheme Diaco wanted and it is what you have until the season ends. Changing the OC next year probably has no significant change because of Diaco's basic philosophy, the lack of players to fit a more dynamic scheme and the turmoil of 3 OCs in 3 years.
I think you can look at BC that changed OC after last year. Same type of ineffective offense this year because the head coach has not changed his philosophy. The fired OC Fitch has an O that averages about 40 points this year at La Tech. Did he suddenly get more creative or does his new head coach have a philosophy that values high scoring, quick strike offense over a time Of possession and minimizing risk/turnovers point of view?
Diaco has to change his philosophy before there is any improvement or change in the offensive schemes. New bodies do not always result in changes.
If Frank Verducci got fired as OC today (like Van Gorder at ND earlier this year) it would at a very bare minimum show that failure isn't going to be tolerated. That very small change, cosmetic as it would be would show that people in charge care.
It's not the scheme that's the problem. It's the playcalling and learning quickly what does and doesn't work. RJ has not proved he (and the center and Gs) can get the tough yards up the middle yet there we were against UCF giving him the ball in a crucial 3rd and short situation.