The fight aside, it seems like wasted potential by not having it 8 man..but alas we knew prior to Early Access (Developer's Commentary video) Yoshi stated majority of the game content will be built around 4 man and select end-game will be 8 man and very select will be 24 man starting with the Crystal Tower.

Heck half the fun in XI against bosses and monsters who can charm was beating down the charmed people (till people complained and SE disallowed you to.)