Honestly it just feels way over crowded. I know a lot of venues can be uncomfortable and you're often elbow-to-elbow with people but there isn't even any space at the back by the bar. It's not just this but they introduced that disabled section near the steps on the left hand side a few years back and it doesn't feel like they've compensated for that in the overall capacity. I also find it has more obstructed viewing points than any other venue I've been to, whether that's the stairs, the low balcony, the sound booth etc - seems you only have a good view if you're in the "pit" or the first row on the balcony.
Anyway, thankfully Beacon is a massive upgrade and hopefully there'll be more gigs there going forward.