Remember that feeling when you realized the Empire technological superiority, its enourmous recources and vastness as you climb Big Freaking Great Wall which they built just to devide continents as well as every time you see capital warships in lead of entire fleets.
As in narative shown in Endwalker trailer (if you watch before playthrough) I was hoping to see streets still being torn between survived military and their own ambitious war projects ("Skynet" automated robot army and production, omega replicas, clones, mutants, various machine prototypes, resonance supersoldiers, etc). With surviving leadership (Nerva?) hiding in "Enclave" bunker commanding soldiers in struggle to return control over empire defense and supply systems. I was hoping to see the Empire societal collapse with all its scientific and industrious superiority turning agaisnt it which was probably the end Allagans met which is a bit poetic and by the way become popular depiction of real world end.
I still see how it can be shown in other "industrial capitals" of the empire which can even be larger then the political one. Where empire remnants and fanatics are still trying to restore order.
Fanfiction besides, if I see various magitek tech in hands of mercenaries or emprie legions becoming merceneries themselves (with custom paint over its magitek machinery as future mounts; ) - that will make me very happy already.