For player influxes, it would need to be heavy on advertising. Having just four core oceans and maybe getting an O56 a month into the server isn't that fun. I mean its maybe fun if you're in the top two factions of a server and its a close contest, but that happens maybe once every few server releases. For me personally, I'd probably come back to the game if there were big worlds. Mainly because I have more fun doing random things and trying to make it work than playing in premades. I think something that gets overlooked is that the server becomes more fun with more teams and more players. Even if they aren't great teams, they can add up and shift the balance or a server.
Playing in the same world type, with the same handful of groups and players, and having nothing to change up the formula gets really stale.