I was discussing with a friend what we read about on the official forums about Ishgard being released after the battle changes are implemented. We came to the conclusion that Ishgard may be the place where you sign up for the 4 and 8 man dungeons/raids. Something that works similar to assault or campaign ops (possibly Einherjar) where upon completion of the mission objectives you would earn currency that could be used to purchase unique items. In addition there would be gear drops obtainable through chests that drop upon completing the zone. (This could also be part of the Grand Companies as well)
Much of that is mere speculation, we also considered that similar to Jeuno, the ability to use airships and chocobos could be tied to quests/objectives in Ishgard and the delay of it's release has bottlenecked the content that ties in with the city.
Companies however appear to focus on the 3 main city states so I imagine there release will be relatively unhindered but also intrinsically weaved into the upcoming battles changes as SE believes them pertinent to enjoying the upcoming content as quite a large percentage of the current and absent player base is generally unhappy with the current system.
I'm curious as to everyone else's thoughts on this matter. Thank you for your time