Why I don't like Eureka? Let's see... You have to stand around in one spot kill enemies for hours on end to level. Just like in FFXI. Except no one wants to do that boring crap so the player base created the much better NM Train, which was still boring. You stand around killing mobs you may or may not get exp off of, that you may or may not be able to hit before it dies so you end up just afking, to spawn a NM which is just a glorified FATE. No one likes FATE farming. We did it for years way before Eureka ever came out and it was boring then. Top it all off with the fact that one mob can kill you in 2 or 5 hits because of the stupid leveling system in the zone so running from one FATE to another or just to your FATE farming party is annoying. You can't solo at all cause trying to kill a mob of the same level takes forever and fighting one higher level than you is more than likely going to kill you. Pagos made this even worse cause for some reason people WANTED to stand in one spot killing things instead of the NM train so SE made the NMs take longer to spawn and when people realized standing around killing the same mob over and over SE took it's sweet time buffing Pagos. Add to that they put sleeping dragons in chock points on the map, had horrible level requirements for the teleportation crystals, Pagos ended up being even more of a chore than Anemos. Then they did Pyros. Which you do level faster and NM / FATES do spawn more often. But then they added the Logos system that was supposed to make the area more fun, but just ended in a chore to try and get the logo grams.
So yes. I love running dungeons cause to me running a dungeon feels like I'm doing something. Like I'm progressing in some small way. Like I have a goal to get to the end of the dungeon and defeat the boss / get tomes while I'm working on my relic. I'm not standing in one spot killing the same Mob over and over waiting for a FATE to spawn only to move on to the next one in some big circle. Perhaps it's just a mental thing but I will run dungeons and trials hundreds of times and be happy long before Eureka is fun to me. Since it hasn't been yet.