I haven't listened to the new album for the last six weeks or so but I indeed had the same idea when it came up that there are guitar "quotations" all over the place (that Why Worry thing in that one song, song number three? And many others.). I thought back then that they did it planned and consciously. Funny that you come up now with the same idea.
LE
I'd agree that these "quotations" were intentional, or most of them at least. Maybe it's Mark's way of saying that the guitar playing isn't all that important anymore, that he's not a guitar god but a songwriter, and that we should all pay attention to the lyrics instead! :-)
If that's true, the next album may come with no guitars at all ;-)