I DON'T KNOW FOR FACT but I am pretty sure that Riley has essentially been the "run game" coordinator which means that he has designed the blocking schemes of our run game.
I think everyone would agree that our running game has been pretty good.
So that leaves designing the route concepts, maybe he just uses what CK used mixed with the position coach input.
Then once you have your offense installed, it's about developing a game plan to attack a defense based on what you anticipate them doing to you. mizzou, OSU, and Texas especially out gameplanned us this year and by the time we adjusted, too little to late.
The game planning and play calling is what separates great offensive coordinators/minds from the rest and why some guys get paid a lot and are sought after.
I've always felt like CK excelled at play calling more so even than play design. We've had some good and some pretty creative blocking schemes though, and even evolved since Mess left and CK took over. I think Riley probably has had a lot to do with that.
That's something that Snyders offenses also excelled at, and there were a lot of advanced metrics to measure missed tackles created and one on one opportunities created.
I'm fine to give Riley a shot if the bowl game goes well because I think they have really good schemes. Whether or not he's a good play caller will just have to remain to be seen.