SOFTS would have been justifiable if they reimplemented the lighting system they gutted at the final hour but it's 2022 and we're still waiting on a mod to do that sometime in 2023 but just selling it as a DX9-DX11 upgrade on PC with changed (overwhelmingly worse) enemy placement at a $24.99 upgrade price was bullshit.
Never forget what they took away from you.
The lighting is not the only thing downgraded. This video breaks down the changes made to the game relative to the pre-release footage.
Note that the build really existed and wasn't just some premade cg. Some of it was left in the playstation network test build that anyone could try, you can see the quality of the lighting in the chariot fight here :
The general graphical downgrade, while a huge disappointment and I wish they had warned people when the game released to avoid the whole false marketing thing, is understandable once you look at this video and see how choppy it was on a console of the time. When they started devving on PC (and DS2 is easily the one From software game that ran the best on PC on release day. After this misadventure, the PC became a second ciizen for From once again, an after thought. ER shows it best.) they got overly ambitious and forgot about console resources. The new graphical assets look like shit because they had to rush to make new assets that fit a static lighting model (remember that changing lighting models in an engine requires changing assets/textures to fit the model or else you end up with terrible results, see some of the stuff that happened in the DS1 remaster that had a new lighting model and looked worse than DS1)