Eh, "oversimplified" ignores the fact that the game had a lot of fluff abiltiies that all jobs pretty much shared. SE condensed down to the mechanics of each job so each job could play to it's style rather than be X job that has no weaponskill DoT combo. They realized it was unnecessary and reeled it back.

As for the app. . . don't use it, as for the justification that it's not needed cause people have Discord. Not everyone is on the same Discord, so while Discord may work for immediate FC it doesn't always work for other FC friends you know, other friends, people in other LS etc.

As for Eureka, while yes it's devolved to fate farming at the end of the day it did achieve it's objective of being a content which provides a means for casual player to obtain loot without the excess of relying on RNG to get them through.