I can see your point, Marcellus - thank you for sharing a different view on this issue and what people might seem to miss about XI
Your approach sounds far more reasonable and like something I can actually relate to than "It was so great to talk for 30 minutes while we were waiting for MP!"
Because I feel the same as you do - I dont want to commit to a static anymore and I cant imagine that any of the people that are talking about the good old times would actually want to give up on the convience that DF and PF are for the chance to might find a friend (something that can happen within both those systems aswell - well, PF is more likely, but yeah). Enjoying the game with your friends is great - but being able to just play the game when you want to, shouldnt be dismissed to easly either.
So yes, there probably has to be another solution - if enough people even want one. Diadem and workshops were supposed to go into that direction. Both were developed as FC-content, because people were asking for that...
...and then, when they got it, they realised "Okay, no, we dont want this - change it into solo-queues!"
Granted, the whole housing-situation totally didnt helped with that and the workshop is some pretty lame "group-content" (3 people afk, the last one putting in all the mats).
In a sense you might be able to say that treasure hunts and Aquapolis are the content thats closest to achieving something together?
At this point I'm not sure if they're really able to change their system though - looking at how they had to back down with diadem because people were complaining and how often I see people not wanting to join a FC or larger FCs that... well... dont know, dont provide any sense of community and dont care for their memembers (and they dont leave because: why?) I'm not sure if that can be changed now, being almost 4 years into the game again. Certain "standards" are established, certain aspects were choosen by the community to be important.
Having easy access to content seems to be one of those (seeing how people are having started several threads about "Please, put potd 100-200 into DF") - I'm honestly not sure how long content would stay FC-locked... and tbh: I dont want FC-locked content, seeing how I have friends from different FCs and would like to play with them too.