Also certain content becomes locked if you don't do the AR tied to it. For example you you can't unlock bozja content unless you do all the Ivalice AR's. The issue with that is is that no one does the Ivalice raids because people aren't interested in doing it, or they simply have it unlocked it yet. No joke that I sat in queue for 90 mins to to do the rabanastre raid and it never queued.