Wow, big changes this time. The new ground shapes are going to make this a very usable tileset. The rearrange was a good idea too. It'll be easier to find the pieces you need and to see how they connect.
I, for one, miss the green sludge even though it wasn't that good. I have an idea. You should make a sister set, one with radio-active green and another color, orange maybe. A warm color would be best. Then, add some other small changes like the shape of the pendant hanging from the chain or the mysterious device in the lower-right. With a matching pair of sets a designer could build a richer cohesive level.