Again, not sure you know WTF you're talking about. First of all, if you don't know the reference to The Ocean Breathes Salty I have hard time believing you knew which one Out of Gas was. Particularly due to Brock's unintelligible nature live. Furthermore, if you think that was an "awesome venue", you haven't been to many good shows. 1. The best place to be at any show is usually close, but due to the only upward grading being on what I think is the west side sloping up (can't imagine the sound carried well over there anyway), I was lucky to see any of the stage more than 30% of the time. 2. Too many damned people in a tight area. 3. The walk to buy a beer or visit a Johnny was absolutely ridiculous.
I'll admit to being a tad dramatic
At least you said it. Your lack of mentioning a fine performance by the band you didn't mind seeing, Band of Horses, shows me what your intent of posting your critique was. You walked into the show with a prefabricated disdain for the headliner and came back out parroting Leyton's cliche'd use of "chord structure" while completely failing to mention the other band's performance. This makes you, wait for it, a music snob! Welcome to the club you mock so much. The next step is using terms like "texture", "atmosphere", "delivery" and "voice". Make sure and do that in repetitive fashion.
I'll fully admit that the cadences they use, especially when they play a great many of the songs at the same speed (one of my only criticisms of the band themselves) mixed with many of the same chords are similar on the last couple of albums. The melodies, bridges, and overall setup of their songs has drastically changed over their career. I still enjoyed hearing the newer stuff but left wishing I'd hear just one song from This is a Long Drive for Someone with Nothing to Think About, Building Something Out of Nothing, Everywhere and His Nasty Parlour Tricks (minus the end of that album at the close of the concert), and more than two singles from Lonesome Crowded West. That's an inherent problem though, anytime you change the band's lineup as much as they have. Hence, you heard about 4 tracks on anything but the last two albums and can't really pass judgment.
In short, had you just gone to be entertained and shelved your bias walking in, you'd have returned and not come off like such a know-it-all attention whore in this thread.