I'm a fan of the rebuild games, and have just discovered this website, as well as the WIP Rebuild 3. Now that the introduction is out of the way:
In Rebuild 2, there was an option to view the danger levels of the squares that have been scouted by adding a colored layer to the square, and there were several danger levels, but only three colors. My suggestion is including an orange danger level so that we can see more of the steps. Like when I'm trying to keep the area around my base secure, I can't tell if it's going from "Safe-ish" to "Troubling" to "Hazardous" because all three of those are represented with the yellow color, and green is only used for when there are absolutely no zombies. Strangely enough, the word "Safe-ish" is still used when there's one zombie or no zombies, which I also found odd. It would just make it easier to keep an eye on more of the changing danger levels if there was one (or more) additional gradient steps to the color layers.
I didn't see any categories beyond "Rebuild 3", so I can't imagine that I'm posting in the wrong area or anything, although I don't know if suggestions are allowed or anything.

That is all! Thanks for taking the time to read this.