In case this hasn't been brought up before ...
When the old Garlean flagship was brought down during the last war, only the flagship was confirmed destroyed. However, a ship of that size and the flagship nonetheless, probably had its own dedicated supply base full of engineers, scientists, logistics people, its own minor army of a garrison, family members of on-duty personnel living on-site as well (as can happen in many foreign bases), and lots of spare parts and supplies at that, which was not confirmed destroyed in battle. In the desperate Garlean retreat, they probably had to cut loose this supply base (more like a minor frontier city) salvaging only what minimal equipment they could carry on foot, and failing to destroy the rest of it, "intentionally" ordering "non-crucial personnel" to remain and maintain the base in case of a counter-offensive, which never quite happened.
Nowadays, it has turned into a mini Garlean frontier city of sorts, which could be the setting for some interesting plot points. Specifically, it could serve as an entry-point to "meeting" the Garlean faction without requiring the plot to be pushed into a full counteroffensive into Garlean territory. The Garlean people, their civics, their cities and architecture, their technology. Many themes can be explored, similar to how themes of class, poverty, politics, resistance, etc. were explored in Ishgard, and was part of what made that expansion's story so good.
I think a setting like this could provide for some interesting plot points if used well, and I hope that between the imagination of me and other players we would be able to come up with some interesting examples or perspectives that will eventually be of help to the devs.