What's your first impression of Eureka?

[Lord_Umbra]

You are the one that is making assumption here.
I am not blind, Eureka zone is always near capacity of 144 at prime time.
Define your "maybe some people are doing it"
Here is trick you don't know.
When you pull up player search in the Eureka zone, it will show you the list of players in the zone including the name and number.

It's easy to always be populated when draw from the entire Datacenter for each region & when still relatively new content/ people still grinding the relic but now people getting Pazuzu we'll probably start seeing higher levels drop out soon.
Also give it a little longer Diadem wasn't dropped in a few days it dropped by around end of first month.

Eureka already suffers from S/A-Rank issues of early pulling thanks mounts/the aethers people aren't waiting more then a minute in my last couple of runs of Eureka, then other issues like your team mates vanishing & mobs vanishing, lag killing you as a invisible mob AOE someone & near that someone.