"Each play has a history and a life of its own. How is that play going to be remembered? If you're focusing on that play and what you have to do that single play, usually you'll do pretty good on it." - Coach Nick Saban
Both recent additions to the staff has had "higher profile" positions that the ones they hold now. The experience factor has to bode well for smooth transitions. I would think a QB coaching specialist with OC experience would know a god deal about the function of WRs. Same goes for a former head coach taking over the Oline.