I can totally understand those who are disappointed with the endings. Let's just say the writing is a lackluster,
I only checked out two of the three, I don't have enough points for the last. Those two had the same lackluster feeling to them, especially the first. I know it was a movie gig that was done quite a few times, but it was still shorter and there's a reason why that trope pretty much died out.
As for the structure, this is what I was talking about almost a year ago when I raised concerns about Kay being basically unavoidable. I need some points from her scenes for the completion, but I honestly rather stabbed myself in the dick than to do that. I had the same problem with MoTH, where I had to suffer through the Diane shit the reach the "perfect" ending.
I'm also not sure it was a good idea to release the ending before finishing the rest of the content. Some of the side stories we didn't even began, and some feels still unfinished like Hana's. Isabella was put in so late and feels like we barely had anything with her to get attached. Giving out the ending before wrapping those up will lead a lot of people to see it as done and just leave it for good. Idk, maybe it's just me but, yeah, I'm not a fan at all.