Can someone from devopment explain why Eureka was delayed for so long?

[Kallera]

Fun is subjective. I find it fun with my friends from FC/LS and cross server friends. I don't find expert roulettes fun, maybe you love grinding that for months? I like savage, maybe you don't like it?

Cool story.

Eureka put me to sleep last night.

Each time I'm reading something like the highlighted part, I wonder: Do you find this content only fun with your friends? Maybe even because of your friends? Because you're doing it with them, maybe even in VoiceChat, talking about some nonsense, while grinding mobs?
Its not meant as attack, everyone is entitled to like different things, but I cant help but wonder: Is this content good and fun enough that you'd enjoy it by yourself? Or is it more the company of your friends that you're enjoying here while Eureka without them would bore you to death aswell in 10 minutes?
Because if it would, its not the achievment of the game that you're having fun with that content - its the achievment of your friends/company. And to spend time with them you don't need Eureka...

Exactly.