I think that the guild island is well designed, I would change the probability of changing the element (rain, sand, trick room, etc.) that of the 100% of changing it is divided in each zone in such a way that there is a greater probability that the This island is in constant change, this is because in the last 15 days, 5 days were trick rooms and there are some that do not appear yet. So my idea is that there is no 12% to change or not, if not that each theme has its probability, for example each theme has a 15% of appearing regardless of which one is currently