Overall a nice idea to have an event that doesn't just require four rogues. However, you should have kept the initial difficulty. Or if you had to decrease something, it should have been the bosses' hp, not their damage output. The final product was kinda eh: a bunch of bosses that do nothing, but take a lot of time to kill.

The other obvious problem was the lack of loot. Nothing in the event zone itself and just a few untradable vanities from the vendor is not something that really attracts people.