There's roughly 1/3 left of the tour. I really don't think they're going to bother to shake things up at this stage. Why mess up a good thing, right? Guy was asked recently whether they have considered adding a new song to the setlist which would cater specifically to the American market, to which he said no.
Never say never, of course, but I would be very surprised if there are any changes. The show where Bonnie Raitt opens could potentially mean some surprises, but if nothing happened when John Illsley or Albert Lee were around in Europe, then I doubt that as well.