Have you configured wally to use the pb2 palette by default? If you configure it in the options, it should work fine. Also, the concrete IS the dirt texture with some modifications. I can see the cracks in the exact same locations. It's fine for another ground texture, but it doesn't really look like concrete.
I see you've scaled down the images for the post. That's why a lot of people are confused, I think. The metal texture looks like you've copied and pasted the same texture over and over. There's really no point in doing this when you can just make the texture smaller and have the game engine do the tiling. Same for the tile texture. There's no sense in making a 512x512 texture that's just 4 256x256 textures copied. Just make it 256x256.
That wood texture is really low quality because of the photograph. I would honestly pitch it. Hope you don't take this poorly. I'm just trying to provide constructive criticism. I do appreciate your efforts. Better to spend some time and create a few high quality textures than a bunch of mediocre ones.