That's my feeling as well. I'd also like to upgrade both OG positions. What do you think about making Ruiz a back up OC since McCoy has had trouble staying healthy lately?
Competition determines who starts and who backs up. Ruiz should compete for the job he's currently in (hopefully with others capable of starting) and if he loses out in that primary competition, then yes, he should back up and cover LG, C, and RG.