I think they were looking for a nice spot on the setlist for Troubles and didn't found it... To me would be a nice main set closer, a nice encore opener, a nice final songs...
The good news is that the band is clearly open to shuffling the structure of the second act of the show. I'm sure this will eventually lead to more than just a setlist shuffle like tonight.
the only thing that didn't work today was opening the encore with a speech... the rest worked just fine, hope they do this again, or take something to put something new