Why aren't your friends doing other content with you? Current dungeons/endgame is not the end-all be-all of this game and never will be, in case you're misunderstanding the design.

Get your friends do run lower dungeons with you for leveling, old raids for glamour and mounts, or overworld stuff like maps or Hunts.

Why aren't your FRIENDS. playing with you? Do they also only do what is "current" to the complete abandonment of anything not at level cap? Or is it just you that thinks that this is the only thing you can do with your friends?