Hey terminal, I got a idea.

What if people can PM you planets/star systems that get displaced that have no faction affiliations you place pseudo-randomly (I.e using GM Judgement) around your map?  Maybe even mark them with a ? and only reveal the nature of said planet/star system when a player warps to the mystery system.  You might get some cryptic alien ruins, a planet where it rains polymers and has regions where plastics cover the surface, planets with really eldritch mega fauna and so on.  With the creativity of all the players this RP has attracted there's no telling what someone may stumble upon.

Personally I think this RP could be all the more chaotic is all we get are displaced player territories and some odd planets / star systems + Your aforementioned anomalies scattered about as "neutral" territory in this new universe.  Just think, civilizations that were used to probably having millions of star systems between their neighbors now thrust in a (relatively) resource scarce universe, if only due to the voids between the stars being huge, dwarfing that seen between stars in a spiral galaxy.  

(Note my impression of this RP is that the true vacuum has displaced a whole universe, not galaxy of civilizations- so no one has any idea who anyone else is with one or two exceptions (even than, I could see terminal putting large distances between said players) I see as wholly plausibile, universes are huge!)