The only critical problem with Eureka weapons and the content itself is that....whats even the point to it? The content is done, it has no agency or relevancy to the rest of the game. To the majority, there is no sense of satisfaction gained from continuing with playing Eureka once you've done and collected everything. So saying that the Eureka weapons outlasted whatever current relevant content is there is just major copium for the flaw of Eureka's progression. Nowadays only the most dedicated and niche group continue playing Eureka or Bozja for the memes or to help newer players get into at the very least Baldesion Arsenal.
To me, the content is extremely padded out and boring because theres no pizzaz, no substance to it other than just farming FATES and BA. I would like to compare the content to classic WoW but thats not fair, because while there is a grind to classic WoW; the journey is set dressed with all sorts of open world activities to dive to, besides just farming mobs. You go explore, do dungeons, do quests etc. If Eureka and Bozja were designed to have that classic hardcore MMO feeling, quite frankly it brought the most boring aspect of that journey with its iteration.
This is my major problem with exploratory content. It lacks relevancy very quickly, its padded out and its not interesting enough to hold "meaningful" retention. People diving into it nowadays are only doing it because they're tied to that expansion's relic; which is mostly used for glam as well as completing its story. What I propose is for the devs to not repeat into the same formulaic design choice with Eureka and Bozja and to transform it into something that's has more choices and substance to its design; without going to just designing the zone itself for the sake of a long grind.
I wasnt impressed when I dove into the content the first time (I mean besides the raids), and after going through it 4 times on different characters, I'm still not impressed.