I'm afraid of this, and people are just going to eat it up and defend it blindly until the franchise gets completely run to the ground because that's how internet culture is these days.
I don't think Seph is gonna get turned around like that. If anything they're aiming to make him some multi-dimensional god.
The possibility of Zack being alive is wild though... There's a lot of little weird shyt that doesn't get touched on in some of the spoiler shyt I've come across. Parts of Aerith's mom being scattered around, Wedge being stuck in Shinra, Don Corneo having Wutai pull and not just fukking around there on a vacation spot, Rufus being a legit problem instead of a spoiled piece of shyt, labs underneath the slums, Neo-Midgar looking WAY too much like the Gardens from FF8, Avalanche 'HQ', etc
shyt, Barret dying too
All I know is that when playing through it, none of it really bothered me except the frequency of plotghosts. (Really felt like a pure Evangelion move.... Whispers being mad fans who are protecting things they don't want changed works lol). I'm gonna just keep my head low on the news for FF7R Part 2. Going into this one without following the coverage leading up to it seemed to be right move for me at least.
But if they're gonna keep making moments from the OG as hype in the sequels, then I got no reason to not be along for the ride.