I've only been going to the Hamlet this year - though I have been to the majority of home games, and I've seen the waiting times for the bar getting longer and longer. To me, there's something really simple that could be done to improve the bar situation out of sight, which is to organise the staff better. Right now, the staff do what all staff in pubs do - take individual orders and fulfil them one by one. And don't get me wrong, they do it really well and as fast as they can. But there's a limit to how efficient this can be. Go to any music venue or large sports venue and the system is different - half the staff pulling pints, half of them taking orders. And it's much much faster. Could this system not be tried out to see if it improves things? Even if it was just initially on the "keg half" of the bar...?
