Agreed.
They could probably make use of Bozja/Eureka to make the current content drought less terrible, simply by giving these zones latest tomes(causality/comedy) from objectives, NMs, skirmishes/CEs, and their respective raids.
Exploratory Zones is what keeps the game alive, SHB felt pretty decent, even when not much content, because of the Bozja/Zadnor zones and raids, when it was present content. It looks making it possible to get the materials for the relics outside the zones, killed Bozja in regards to doing objectives and its raids, when compared to Eureka still being well and alive, having its NMs spawned and raids done, because it relic aren't gained from outside.
If they simply tied EW relics to Varient/Criterion, or even put them in past Exploratory zones, could have solved some problems, like how fast variant/Criterion dies shortly after.
Over all they really need to bring back zones like Eureka and Bozja.