There's a lot of Moe-trope checkboxing but otherwise it's a traditional Hero's Journey plot told with expertise I think, with genuinely dramatic twists and a core theme that keeps resonating until it culminates in the denoument at the end. It's a grand journey and it can give you shivers for how well executed it is on a writing-level and presentation level.
The only issue is that you can sometimes tell they split each chapter up rigidly between the two writers, which occasionally formed sudden shifts in character development as if they hadn't communicated enough about where things were going. Specifically I felt Nia as a character shifted too much between being humanized and introspective to suddenly being tropey "I am the protagonist's waifu" kind of character. There's stuff between chapter 7 and 8 that irritated me.
The ending I haven't really been able to put into words but in the moment it feels amazing. You can, however, also tell that by the end the story would vaporize if they took it any further. They really closed the book on every concept they had come up with at the end, and while I'm not sure all of it was self-explanatory by then, I did feel a great sense of closure, and dramatically the final cutscene really made my heart race. It's a bold and interesting ending I think.
I think Torna is my biggest issue honestly. They end up feeling like the signature Nomura characters who have been mandated to pose in certain ways and say weird things that suits his conceptualization, and then once they fill out their role in the story it's as if they weren't really developed properly. I'm definitely the most Torn(a) on the Torna cast. Malos makes sense but he is kind of an oddball to have as the main antagonist, but the rest, even Jin, I'm not sure I fully understood.