I just finished this and have mixed feelings about it.
There wasn't enough time with Gustave, so when he goes, I didn't really feel anything. And then he and Verso look so much alike that I had expected for there to be some sort of tie in between those two.
When the big reveal of the Paintress comes out, I kind of stopped caring about the story. It made it feel kind of pointless because the stakes didn't feel real anymore to me.
Some of the game play was too repetitive, and after getting the Picto that takes the limit off your damage, the battles just felt more like chores.
I don't know if i missed some stories or gameplay..but there wasn't much of a 'romance' story with Lune.
Overall, it's a beautiful game. Great visuals and music. I'm glad I played it, and it has a lot of good stuff in it. But a bit overrated and I dont imagine I'd do another playthrough.