Current State of End-Game Contents - A Blog Post from A Japanese Player

[Dashuto]

I'm am not really liking how 1 can mess up an entire fight.

Ultimately the OP makes this one of his strongest points. And Yoshida believe it to actually be the defining factor of endgame content (meaning we will likely continue to see instant wipe mechanics in 90% of endgame content).

There are many MMO that make things challenging without insta-wipes from a single person messing up. The mere fact this is all it takes to ruin a group, is part of why people are always on each others backs, or too afraid to try.