Most people wouldn't notice the walls, but if you look close you can see that there is a loss of detail. The first is missing a lot of cracks and the last is just muddled that most of the dark spots are just gone.
I can't look through every location, but I think the point has been made. I hope the devs can take the time to reverse some of this, if not all of it.
This is terrible Cryptic, please reconsider this. The game is already full of PS2 textures. You should be trying to move forward not backwards.