I believe linkshells are probably a greater cause if FC mortality than Eureka. As it stands now, there is not real major benefit to FCs besides some buffs that can be duplicated via other means.

I found many aspects of Eureka good and others not so good. As Yoshi said in the BA thread, they were experimenting and watching. They learned a lot and hope to try again with what they have learned. This is all to address an even bigger problem, the formula for the game has not changed since 2.0 in any major way. Diadem, Eureka and other events are them trying to find something new that the players want and will love.

What does this mean for us? New thing to try but that means we have to do our part too. That is, try it and give them the best feedback we can. Even spirited feedback is good because that tells them how strongly we feel about it. Sooo... keep complaining and hold their feet to the fire! Keep letting them know how you feel about everything!