I can only surmise you were receiving a course of EST during The Gloaming. Not one of my favourites on record to be fair, they added utterly nothing to it. Thom wandered about the melody like a pissed-up tramp, Ed's backing was in another key, and Colin added a dissonant bass part. They did it far better at the last gig in Manchester (though my reaction was "meh" then too). I'm a big Autechre fan, so don't think I don't "get it" or something. It was shit.
I agree, the front was fine - it was the rest of the crowd. I was stood about 15ft in front of the sound desk and got multiple beer showers from the cockends further back who'd come to drink and shout at each other. It was fucking rammed, wasn't it!