Well, whatever happened I think it's time for a rethink at the end of this tour. Whilst he's still playing well and the musicianship is fantastic, the set list needs a serious shaking up.
It's been pretty much the same since the Shangri-la tour, with the exception of a couple of new album tracks thrown in each time. The core of it is essentially the same, with the same few songs being played to run out the show and R and J and SOS in the middle etc.
Well let's compare tours on, let's say, a typical setlist (I won't go into the small variations)
GH vs. OES: 8 songs in common, 2 revived songs from previous tours, around 10 new ones; 50% (revived+new;) 50% DS, 50% solo
STP vs. GH: 9, 2, 7; 50%;40/60
SL vs. STP: 13, 0, 4;24%;40/60
KTGC vs. SL: 9,2,6; 47%;30/70
GL vs. KTGC: 10,2,5; 41%;30/70
Based on these numbers, we can safely say that:
1/The DS portion has been constantly reduced to be stabilized at 30%; a list of songs that captures the very best of DS history, SoS the one that started it all, TR the most beautiful prog rock song ever, BiA the most accomplished touching one, and RAJ.. well that's the one I would like to go in favor of ToL as a love song, but I allow things to be not 100% perfect. This reduction is a sign of moving forward rather than senility.
2/The least innovative tour was the acclaimed Shangri-La one, and the GL tour is in the same line as the KTGC tour as far as innovation is concerned.