Not everyone understands cobble gens on the first try. The cobblegen example at spawn could have a slight improvement. Currently, the example has cobble in various spots, which makes it harder for someone knew to the subject to distinguish where the cobble will generate. I suggest any flooring should be replaced with dirt or grass blocks, which is what the player will likely experience when they build the cobble gen on their island for the first time. Or any other block that is not "cobble" for flooring. The example on the survival server is clearer. ----- This idea came after some people who had re-created their island multiple times claimed they didn't understand the cobble gen. In the end they were trolls who were trying to exploit and where taken care off. But I decided to take a 2nd look at the example.
