I would say it went from maybe moody (this might not be the right term, but something like it) and more manufactured, to now being more realistic. Better technology has allowed games to have lighting that gets very close to reality, especially with ray-tracing. It sometimes comes with the cost of creative control though.

I wouldn't say either is bad. They can both be amazing or shit depending on how they're used. It's easy to pick the best or worst offenders from either to make whichever one you want to look good though.

The main consistent difference I'm seeing here is contrast. The more modern versions have darker darks and brighter brights, with less midrange.

I still dislike the piss filter

It works for Demon's souls because it's a dark fantasy game and the new graphics absolutely nail that vibe.

You would find more colour in the mud at Passchendale.