Sorry to bump an old thread but I just finished the game and watched this tech review again and I can't believe how the IQ in performance mode (or lack thereof) was ignored. No 400x zoom needed I just cropped these straight from the console 4k shots and made a few GIFs too.
Anything with transparencies like the next two GIFs and video looks awful. I guess the base image is just too low res and the checkerboarding completely breaks down.
Particles similarly look awful. You see these blocky particles essentially every time you shoot a machine and get sparks but easier to get a comparison shot with this electrified pool.
Every time you use the glider it looks like there is a retro filter applied.
And many of the cutscenes seem to tank in resolution and look like base Xbox One quality.
The allegedly beautiful water looks less than impressive thanks to the blocky particles.
The weird lighting (not exclusive to performance mode) was ignored - I noticed this in the first 15 minutes of the game so it's not just a couple of bugged spots.
They touched on the SSR but it really is some of the worst I have ever seen in either mode.
The grass shimmering is really just a part of the problem. I can't believe people were saying they couldn't see a difference between modes or that it was just badly set up TVs.
This tech review seemed more like the sponsored Warhammer 3 piece where they obviously couldn't dunk on the game for fear of pissing off the publisher.