I know it sounds strange, but the Devs need to work out how to make people host FEWER servers. Or get to the root of the reason WHY people are creating so many servers in the first place. I'd rather have 25 lively servers than 100 empty ones.
Random fact: The amount of servers has notably decreased (~ 50%) since the introduction of the requirement to authenticate servers already. This was an expected and not unwelcomed side-effect, though we have no desire to actively bring down the amount of servers - Eco as a framework game lives from the fact that people offer different experiences and that is also the typical reason for having different servers and communities. A big amount of the remaining servers isn't actually very active and the rest tends to have notable differences - smaller and bigger ones in how they want their server to run.
Something server admins had been talking about Pre-Update 10 was to facilitate "Server Merges" where the respective governmental setup would be done as a federation on the new server. That doesn't allow different configurations / mods, but is something admins can do if they think the same as you.