In case the setting is used as the main stage for a MSQ quest chain or even an expansion, further points could be considered are how during the last war, spies were probably sent by all major powers to infiltrate this base, and but also cut loose after the war as the base was assumed destroyed. Furthermore, opinions and perspectives within the base would be quite diversified considering what happened to them despite being Garleans, and how some of the spies would have become integrated and also influence opinion. Depending on how this is played, it could even potentially come back to threaten internal politics on our side, such as "personal" ties to some of the main city leaders. In any case it could mean some cool stories intrigue-wise. While 'politics' may sound old and boring on paper, in reality it could be used to generate some of the most singular and iconic scenes ever, if treated well.

Another selling point could be the Garlean architecture and technology. The technology could be used to supply a new class or two with background, while the architecture could be used to supply new housing mechanics with background.
- For instance, there hasn't been a true "mech" class in FFXIV yet, but even if a mech class in the traditional sense is unsuitable, there could still be for example a class which "folds" its "technology" like origami, into a support class with unique mechanics and visuals interacting with both the enemy and its allies similar to the Astrologian.
- For housing, an idea I had was underground botanic gardens, similar to Saint Mocianne's Arboretum. The Garleans housed their public civic institutes such as their botanic gardens, deep underground within bomb-proof vaults. It was the pride of a city to have their own well-maintained botanical gardens, as it was a proof of both scientific and civic achievement. The flagship supply base, being a prestigious and large establishment in itself, had its own minor city in form of the family members of many on-duty members living on-site, thus had many "luxuries" including a botanical vault. Long story short, after lots of "plot", we can now grow gardens under our housing, without having to worry about over-detailed trees increasing load times of the whole housing district.

All in all, while it is probably a bit late (for the next expansion which will probably come by summer) to be bringing up an idea like this, I still hope it could be of use for the devs someday, if it has value. FF series lives-or-dies on its story, and a good, memorable setting with lots of potential for unique "perspectives" shouldn't be wasted. (For instance, a "pen-pal" mechanic that allows us to frame quests in a passive tense, allowing for more immersive storytelling and skillful weaving of plot points, with less interference from the modern-day social sphere.)

More details will continually be brought up in following posts by me and other imaginative players regarding this setting.