From the sounds of it, I was one of the lucky ones who got the chest. Though my issue was running that event from the start to end, I did not get any Event reward (such as the standard "Gold’ “Silver” “Bronze”) From that I missed out on a lot of xp/coin/karma but I did die a lot (I was on my lvl 40 thief). Frist question people had for me was “what were you doing during that whole time?” Answer was simple, I was firing my bow, using aoe when I could and rezzing anyone I could to help keep it going forward. Maybe I wasn’t doing enough damage over all because of rezzing the dead, if thats a case something should be fixed with helping others to overcome an event.