I think the issue with current endgame is Bosses drop something for everyone.

The nice thing about XI is the content had a variety of bosses that didn't drop everything for everyone but rather dropped things for certain jobs but you had the option to fight more bosses if you wanted to get loot for certain people.

With the way the current drop system is, it creates a bottleneck because players are unable to say, well this boss drops war/drg gear so we'll try for this one then aim for the boss that drops whm/mnk gear. Instead it's we'll fight this one boss and hope for the best.

I hope they have plans to introduce more content/variety of bosses that can drop a smaller amount of loot to reduce the RNG to at least make it easier for loot to drop for something somebody wants, so if there are 6-8 bosses that drop loot for 3 jobs each, then if you only want gear for say your static composed of a PLD, WHM, DRG and MNK then you would only have to fight 3-4 of the bosses since those are the bosses that drop the loot for those jobs.