Apparently Robert Osborne interacts/narrates alongside the tour guide through half the ride now too. And the new preshow is a whopping 50 minutes. Haven't seen any of it yet so I can't comment on the quality of it yet.
I just hope that the parts where Osborne talks on-ride doesn't take too much away from the live-CM experience, much like they did with Living with the Land and Backlot Tour.