You haven't played the game, yet you are really going for this shit show narrative based on second hand information.
I'm breaking down for you guys the situation chapter by chapter and all I can say negative is that I don't like the small number of optional side quests (6 per town, I've done 12 in two chapters so far, most chapters don't have them) that are to much like FF14 MMO quests. However they are there to force you to backtrack to encounter enemies, replacing random battles and all focus on making you care about the characters you already know die. So I understand why they did it and some people will like it.
There have been zero storyline changes up to and including Sector 7 Destruction so far, just hints that Sephrioth is self aware of the remake and the ghosts stopping you from deviating from the original story that have appeared 4 times so far. I like that addition, I wanna see what they do with it.
Nobody is going to give a shit that some individual textures are low res when the game runs extremely smoothly without loading screens and the characters and vistas you are supposed to be looking at are amazing.
You are talking yourself out of sharing an amazing experience, because to save face you'll never admit to buying it. Just chill out
If they fuck it up I'll be the first to come in here and say that, I hated FF13 and therefore never played FF15.