Landmark had a fair amount of servers that you could choose from but it was a finite number, so the result was that there were always others around.
The problem was that there was always a rush for the best spots. Those who got them had joy. Those who didnt had grief.
I think where RW might succeed where Landmark didnt is that is that not only are the servers procedurally generated but that after a while you realize that areas repeat (layout-wise), so if you found a spot that spoke to you and was occupied you could just wander a bit and you would eventually find it somewhere else.
Instead of allowing single servers for everyone they could instead have a set number of servers to choose from with pre-set rules. PvP, PvE, Animals dont attack, etc. That way people could still choose what best works for them while forcing people into the same server.
Even if the term "forcing people" doesnt sit well with someone, consider that the world is endless and its technically? possible to never see another person.