Consider this....
Many of the game's terminology, names, and roles where tributes to the past...
-Vivi was designed like the past Black Mages (Last appearence of Black Mage before FFIX: FFV). Also the Black Mage race reentered the series.
-Garland was a tribute to well... Garland of the past (FFI)
-Kuja in many ways was a tribute to Kefka. (Kefka looked silly and got made fun of for that, same with Kuja.
FFVIKefka started off as the right hand man of a Ruler only to overthrough him same with Kuja.
FFVI and FFIXKefka and Kuja both obtained the power they wanted.)
-Deathguise was named after Deathguise.
- A return of the old Summons (Ramuh, for example)