Every dungeon should be a Variant Dungeon

[MintnHoney]

What's the difference between 1 dungeon with multiple different routes/bosses and just having multiple different dungeons?

Same set pieces, same characters, different encounters, possibly varying level design, maybe different aesthetics, and potentially different results. Unfortunately, FFXIV isn't really built for something like a storyline with branching paths, so any different results would have to be incredibly minor (and when things are that minor in FFXIV, they're basically ditched and never acknowledged again if they can help it).
I suppose they could just drop the pretense and go full Visual Novel on us, and let people actually have a "choose your own adventure" style mini-campaign or something, but that'd probably cut into the grass development.