The key to both McRib & McGriddle is to enjoy the superficial flavors but not eat them so often that what's underneath comes to the fore.
This last one I got had WAAAAAY to much sauce, which was weird, because the main reason I eat there to begin with is there construction, I can always eat it cleanly with one han while driving. This was not that. Fortunately I was not driving, but that's beside the point.
However, root beer is in theory a great choice for an accompanying beverage! Of course, devil, details, etc