Not all but a lot of the textures within the game have been slightly tweaked to smooth them out a little. Hopefully making the world look less texture busy and a feel a little easier for people that find the base textures a tad to bitty.
I may still tweak the textures a little more and add a few more as time goes by but for now this is mostly how things will stay for the vanilla textures. I am currently working on mod support for a few mods I use and will add them as soon as possible.
For the small amount of textures changed to my personal preferences I have included a move vanilla option within the pack that you can use to replace them and still have everything feel right.