It's not the length of the track. Deerhoof have had long tracks before: Reveille has an eight minute song and Holdy Paws has an 11 minute song. I think it's more the fact that 'Look Away' doesn't really make sense. Almost nothing in it is repeated, as if the band were writing the song as they recorded it. At first it feels like a bunch of chaotic, seemingly random notes and sounds, and there's the "ok....no, it's still going....ok....no, wait...." ending. With enough listens, though, it begins to take on a strange logic all its own, in the same way that bizarre album ending tracks like 'Revolution #9' and 'The Return Of The Son Of Monster Magnet' do.
It's still the weakest and most out of place track on the album, for what it's worth.