1. They completely reworked their entire set.
There are remnants of bits they put together for their "A Cross the Universe" tour still lingering, but for all intents and purposes everything they have going on in their current set is new, fresh, and inspired. They worked in their new material tremendously, but they also re-worked they way that they perform some of their old material, bringing in an actual keyboard for one of them to play on while the other manages everything else.
2. They went from too-pretentious to just-pretentious-enough.
When they played Metallica at the end of their sets back in 2007, I wanted to punch someone. They tried to go too far toward hard rock without being hard rock, and I thought it was terrible. This time, they seemed to grow up a bit. They still had a good amount of French arrogance (no offense to the French folk on here
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3. They took a cue from Daft Punk and completely transformed their work for the live set.
The best electronic music performers I have seen have managed to take the best performance elements from a number of different genres of music--the "spontaneity" of jazz, the psychedelic-meanderings of classic rock, and the lovely mind-meld of the rave scene that most of us electronic-music lovers have found and embraced since our first live experience. Justice deconstructed their near-entire catalogue of music and reconstructed it for the live set in a way that resists the formal track-by-track performance much in the way that Daft Punk did for their Alive 2007 tour. The end result is movements of dance music that hinge on the various samples in many of their tracks, stretching many of them into 15 to 17 minute versions that keep coming back and hitting harder and harder.
4. Their build at the end of their set rivals the Chems' live version of Believe
It does, really. Believe still is, for me, the best, most intense peak that I've come across, but the fact this made me question it is absolutely fantastic. Take a look at this YouTube video. The breakdown happens at 1:45, and the final peak doesn't hit until 4:45. Three minutes of build with an on-the-way peak toward the final build peak. That's some fantastic energy work right there. No doubt.
That's about all I've got for now--absolutely glad I got to see them this time around. A+