I think most people despise PuG content and DF/PF toxicity.

To me, the core of this game is small-community content. It's content that allows a group of friends that keep in contact through FC or LS to have fun and hopefully expand and sustain their clique. Dungeons are a bit too small and restricted due to role limits to really support a slightly larger group of friends. Savage raiding has moved away from that in a sense because you can no longer value friendship over skill if you want to progress whereas the difficulty of Coil was tuned to allow for a static of varying skill to clear. Though, if you can find a group of friends on the same page in terms of goals and skill, Savage is great.

So, I don't know why you would say things like EX-trials and Weeping City have no longevity. I frequently end up doing EX-trials to help friends clear / farm, and do Weeping City at least weekly for the materia / glamour or alt gear. Some of the most fun I get in this game is from going into Weeping with a full group of friends and just messing around. The content still has enough bite to keep you awake and it's easy enough to not be stressful. It's a good break from Savage.