The absolute crippling lag makes the dragon encounter impossible for many people, just like last year and every year since this event was spawned. Every year people bring up the same complaints about the lag and yet there has been no serious attempt to fix this problem. It's been pointed out that the mass spawning of the mobs combined with the number of people per instance is what's causing this so here's an easy solution: cut everything by half. Half the mobs, half the rooms, half the people, half the dragons HP. Problem solved. As it stands now the encounter with the dragon is laughably easy and the only way anyone fails is thanks to the 5 minute slideshow this game becomes, so it isn't a balance thing.