Well, I liked it. Yes, its gameplay is sub-standard, and getting ending E involves a lot of bullshit, but the game's strengths make the entire trip worth it. The soundtrack is wild, the UI is attractive, and the storytelling is audacious. It's a game that seems aware that it's making the player hate themselves a little bit, and I think that's pretty funny. Definitely going to check out the rest of Yoko Taro's games, because I hear that the storytelling acrobatics are even more prevalent.
I also played another PS2 RPG with mediocre gameplay but other strengths, but I didn't finish it. Okage has great dialogue, but the turn-based combat was so banal, and I felt the story wasn't going anywhere interesting, so I dropped it in the last chapter.