I have a suggestion about the color of the districts.
You do not need to do as before 4 colors, there will be 4 forever empty areas, gold and green. And other than that, there will be no place to play for gold in the morning. To protect newcomers from experienced players, it is better to differentiate districts in another simple way: make only two instead of four types, districts for all and dtistricts for players under 100 R, where 101-255R players can not go. And to designate these districts just as the districts and the districts for beginners.