It is funny how as time passes from finishing ReBirth, the less fondly I remember it. For me, it's the ending, the level design, the checklisty and overall sluggish nature of a lot of things, and noticeable lack of polish in a lot of simple problems tons of games before it have solved. Whatever I played after the credits were all things I replayed in FF7Remake, which is basically anything combat focused; it's the one part where the game truly excelled. It seemed to have sacrificed a ton for the sake of fanservice, tbh. Which I can respect the attempt but I can't give it points just for that.
I think the "Remake" project was really poorly explained/thought out. The game that is actually closest to a 1:1 remake of FF7 not being called "Remake" or having "Remake" anywhere in the title is really weird, and I just feel like whatever the big idea is, it's just not resonating. I almost wonder if they're rethinking making Part 3 actually open-world, and just having towns and linear setpieces connected by flying the Highwind.
I hope after Part 3 the FF brand takes a little break, give people time to miss it a bit before coming out with FF17. 16 was revealed in the middle of 14's resurgence and the mixed reception about Remake, then came out between that and ReBirth, 16 discourse was nuts before ReBirth came out, etc. The series just needs some clean air to live in.