Finished the story. I really don't understand the restrictions SE has set in place for the ending, where streamers/YouTubers can't show the ending, because it's the most obvious thing if you have even the slightest knowledge of FF1. Seems weird to me, but whatever.
Having said all that, I had a great time with the game overall - the combat and moment-to-moment gameplay is very fun, and Chaos difficulty seems like it'll keep me engaged for a while longer. I've yet to touch co-op though, maybe now is the time since I apparently get more Chaos mats from co-op
Edit: oh and Protip for the second phase of the final boss: Liberator with the Mighty Guard upgrade that makes you invulnerable means you are literally unkillable. Normally, taking hits while in MG will eventually break your guard, but I noticed in the second phase you have infinite guard meter so I just popped MG and spammed R1 which regenerated the MP needed to keep Mighty Guard up. 30 seconds later, EZ win on "Hard" difficulty lol
Edit2: Forgot to mention the music selection was really good in this game. From the original stuff to the remixes, most of it was very good. Hearing Tough Battle 2 in Delkfutt's Tower was a rush of nostalgia - I absolutely loved it. I even felt a little wistful when I heard the XIII leitmotif... and I don't even like XIII! lol