There were rumors a long time ago about SE working on a patch 1.1 - but there's been absolutely no word about that in a long time.
There were a lot of people claiming that the game would get a patch to fix all the obvious problems, but I think all those people were just speaking from their gut. There was never really a rumor that I am aware of, just people trying to deflect criticism. "Stop talking about the door, guys. It is obviously going to be fixed with a patch!" That kind of thing.
It is interesting that they didn't clean up a few of those issues, though. It wasn't like it needed FFXV amounts of work, there are just a few things that needed polishing.
As is, it is an extremely beautiful game that is occasionally shockingly ugly.
Both KH III and FF VII are really polished games. Maybe that's a Nomura thing.
But a patch to fix the texture issues would be good.
I haven't played Kingdom Hearts 3, so I can't speak on that game, but I wouldn't call Final Fantasy 7 Remake "really polished". It isn't a complete train wreck like Final Fantasy XV was, but it still has a number of technical issues and rough spots. It exists in the space between polished and unpolished.