I've attempted the Dragon's End meta on a full map during peak hours 6 times and only one of them has succeeded. After 1-2 hrs of play on a map I find it disappointing for the event to consistently fail. Maybe other people also find it too hard to be so perfectly coordinated with their builds and theirs boons, and their dodges etc. I don't care what the actual cause is. I don't. I just don't want the meta to fail so often. It's holding up any achievement requiring access to the area called "Mother's Lament". I have some tolerance for frustration but not this much.
Moreover, the population of maps falls over time as new maps are released and players move on to the newer content, so the problems with this meta are only going to get worse with time.