Judging FFXV's Final Fantasiness so far

[Sephiroth]

• The Final Fantasy theme (also known as Prologue, and no, it's something completely different than the Prelude)

I think you mean the Theme that is literally called "Final Fantasy". Or "Staff Roll". Which in my opinion is not associated more with FF than the Prelude is as Main Theme (even though it actually is called Final Fantasy).

• Is the victory fanfare in Duscae? If not, they should put it in the game, defo

While levelling up.