A few hours into the server you will see a lot of kings appear with low prestige and random names.
They menhir a ton of players from their meta and then the kings either delete, go inactive, or sometimes they join the people they brought over.
The menhir system allowed us to play with the people we want.
Now I noticed that playing the outer side of the map also has the advantage that you don't have random players in your kingdom that you DON'T want.
You can't menhir away the people that you do not want to play with.
People who want to play center will be stuck with grey villages in their kingdom for 21 days. That's pretty sad in my opinion.
On top of that, people who are actually active will likely be joining a meta, which usually settle along the edge of the map, or at least not center. Those active players will menhir away and their spawn locations will be filled up with new people until you have someone who will stay. Those who stay are more likely to become inactive soon. For a center king this basically means the menhir system is rerolling their spawn locations until they get an inactive player. That's kinda sad.
Now I don't know a direct solution to this but maybe you do, so please let me know what you think.
What I do suspect will help a lot is if the spawns are a bit more spread out. Right now kings spawn with borders touching. If there could be a bit more space between them, say 2 tiles more, and govs could only spawn in the initial area of a kingdom (the below 100 pop influence) then the king could use the tiles he gets from expanding his influence to menhir other players without worrying too much about what people spawn in his area.
This would also push people a bit more outward, meaning even the kingdoms who play along the edge will experience some drawbacks from having people spawn in their area who will soon go inactive.