I notice a lot of people pointing out you didn't change anything and just ran things through a filter

My answer from the comment section:

I'm fascinated that people care so much about how I changed the textures and what I did, rather than how the modded version holds up to the vanilla version. Nevermind. This is what I did:
I added edge detecting smart sharpening to the textures (Unsharp mask increases the apparent sharpness of image by increases the contrast around edges. Dark patches near lighter areas get darker, and light patches near dark areas get lighter) So basically yes, I added contrast. I carefully looked at how much filtering makes sense for each and every texture. For some I also added some AA afterwards when edges were too sharp (especially a problem with the wall textures, they're really low res and I might overhaul them via upscale. See what I can do)
So there you have it.
It was a learning process and the first time I ever created a mod or worked with textures for a game. I'm very happy about how it turned out and how much positive feedback it receives.