Once people learn where the lieutenants that buff the second boss are I imagine it will be easier.
At this point I think it's more to do with people not having a good grasp on the giant explosion you have to lift away from, and not really knowing where to land in Mereldar.
I really like the dungeon. I can see why people who don't like Dynamic flight would dislike it, byt this is more what I imagined back in DF with the Nokhud dungeon.
Constant movement. A couple of mechanics in the rights that require flying. And the actual airship that gives you a good view of the entire zone from the air.
That being said, this one is probably not becoming a favorite among the pug crowd before it's a good few weeks into the season.