EoFF Plays LR:FFXIII - Ending Discussion

[Sephiroth]

It almost makes me feel like the journey through the trilogy means nothing, because of that ending. Although it's not that drastic for me, it's still nonetheless anticlimatic.

Its not like it was retconned, which was logically impossible anyway, it just ended for a new story.

Also, Lightning did not really return to how she was, she just completed herself again. Pretty much like Sora and Roxas. Lumina was just the part she needed to push away to become "Lightning" for Serah at her mother's grave and manifested as an own person. But maybe you meant that anyway.