Yes, we don't know much about it now, but what they've announced is disappointing.
They're introducing mod tools for single player... need I say more?
What they're doing now is, they're trying to please everyone.
Modding, alternative endings, Aranea episode (I love Aranea but an entire episode focused around her screams trying to please fans), and Luna sounds like a whole heap of "what if" content.
Who the fuck asked for single player character modding? That's greatly diminishing the importance of Noctis's story in the main game.
What gets me is, this does not sound like content that will be integrated into the main story (aside from perhaps Aranea since that includes the fall of Niflheim)
They're doing something wholly unnecessary and it seems to me like they're creating a game fans want, not what they want.
"The concept for the new DLC is to “realize a future everyone longed for.” They will bring an “alternate grand finale.” It won’t overwrite the existing ending, but it will be an option for those who want"
https://www.dualshockers.com/final-fantasy-xv-dlc-new-finale-announcements/
This says it all.
Undermining the main story.