Final Fantasy XIV's balance system ensures that any job is viable in all encounters, yet there's a technical limitation in the latest Ultimate raid, The Omega Protocol. It's causing many groups to switch out jobs that have too many buffs because of a specific stage of the fight.
The Omega Protocol Ultimate's engine currently limits the number of active buffs on a single player at a time. During phase three, a mechanic called Hello World places multiple buffs on everyone in the party. The staff cannot afford to provide their own buffs to themselves or their fellow party members.
The newest Extreme Trial in Final Fantasy XIV is unusually low-profile.
If not for the fact that this phase of the encounter has a very tight DPS check, many party compositions are struggling to meet this demand with jobs that have a lot of buffs. Certain progression groups have traded their Dancers for Machinists in the ranged DPS slot and tried to have a Samurai or Black Mage in the mix.
The buff limit is causing pain to healers as well. Healing cannot place regen heals, shields, or mitigation on party members to help with the incoming damage as each of these counts as a buff stack.
Players are hoping that Square Enix will correct this mistake. Ultimate raids should not become a more difficult task simply due to technical limitations of the engine, and no player should ever feel like they are limiting their group's progress by doing a particular task.