Epiphany

I find it hard to believe you are talking about "End Game" Are you serious ? this game is not complete , it is 1/4 of way Although Yoshi Has commented 1/2 through completion and "End Game" ? ask this question i think after Patch 2.0 and beyond, it still will not be Finished. You can join any link shell any time just need to shout for one at Ul'Dah or Limsa or Grid.
Becoming a member in a link shell is not Hard really ;-)

There are many people out there with min 2 link shells or more , though I do admit Finding a "Good" link shell is another story.