I recall people were crying about Eureka because it was too hardcore with the exp grind and exp loss on death, and how Bozja was too grindy too and not for the casuals when both field operations were released. Not very casual content per the casuals.
Now, I don't consider Eureka or Bozja to have been particularly difficult. But I didn't include Field Operations because it contains multiple systems whereas dungeons, trails, and n.&a.raids are their own separate system.
Easier to just say there is an overall lack of content in FFXIV without having to labeling everything casual, mid-core, hardcore.