[quote=Skallagrim]
A true multiverse accounts for all possibilities. Everything possible can occur. I agree it seems to be a lack of focus.[/quote]
Yeah, but for some of those possibilities to occur and let some worlds to travel to another, you would have to break it a bit first....Well, getting another world connected to a world and having the two of them interacting with each other is a possibility 

[quote]
So how can it be adjusted to encourage player focus? How to enable the players to work together to create a persistant multiverse?
[/quote]

'True' Multiverse is incredibly big though, and since we're doing this for the Arena, any attempts of banding all players into a single group is rather counterproductive. The best way I can think of is...well, a war between two worlds encompassing several area/worlds. The players would be mercenaries or something. Enough reason for the players to stick around in a general area, interact with each other and fight.