RAS is just an objective measure of athletic ability. The point is that he has the athletic ability he just hasn't put it on the field due to bad technique and possibly a lack of confidence and coaching. So, his issue is not lack of quickness to play LT/RT, his issue is that he has poor technique and, similar to your neighbor's daughter, is petrified to face elite NFL pass rushers. Putting him at Guard over tackle doesn't solve those issues it only means that he will be facing bigger bull rushers which is an issue because one of his technical flaws is that he does not anchor well. But, I hear he also Ubers well.
So, make him fail (or succeed) at RT, before moving him to Guard. I'm going to have to trust that Dennison, Kubiak, and the rest of the offensive staff know if he needs to be moved to Guard or not. And, if he doesn't prove to be ready to start at RT I doubt the new offensive staff even starts him in the first game, much less for 5 games.