Another converted player. HATED IT TO THE CORE day 1. Having fun with it now and as long as they update it, I think it'll last.
And yes Eureka is "fun with friends" and friends can make everything better, but it's not just because of that.
It's also because it IS nice to have content where I don't just do that to get the boredom away (like MSQ roulette), I feel like I have to in order to play it well.
For people who aren't afk-ers, who actually push their groups to the limit (like oh...taking on 5-10 bears at a time while still being under their level), this can honestly feel even more intensive than savage and coordination between party members can become genuinely important, with tanks that actually feel like they have to be in tank stance, and healers that actually feel like they have to heal all the time or their group will wipe, and there isn't much other content in this game that can provide that except for doing massive highlevel mob pulls in Eureka.
I can't speak for everyone of course.
But I can say that not all people who are using voice chat with friends are doing so to get the boredom to go away, some of us are doing it because it feels well suited to playing the instance in an intensive manner - no different than how many people use VC in Savage.
I also think a lot of people understimate how much background work (things not very noticeable) must have been developed.
Nowhere else in the game can people switch parties in an instance. Nowhere else are there mobs based on weather or time. Nowhere else are fates spawned based on mobs being killed. These might seem trivial, but they all take development time, and those are the things that have been found (might be more).
I also think the response is just fine. They can't after 3 days mention more specific things as they need to review all the feedback, see what fits the direction they're going with, do man-hour estimates, etc... The most a community team member (or even a dev) would be able to say about anything that would be more significant than just changing loot tables is "We are reviewing other feedback for further updates in the future" - and that's hardly necessary. Surely it's obvious that if they read enough feedback to know people don't like the loot box sparklers/untradable rewards, then they've also seen all the other feedback and are thinking of ways to make the community happy.