Those voyaging through this space at speeds obeying the physics of light are on very long hauls indeed and may not even be conscious when they enter the kuiper region and beyond. Routine stop stations like Absolute Zero itself are wasted in that space, and unless Sedna is made of precious metals common in the deepest solar space, then there isn't much reason for anyone to head out there as a destination, except to hide.
I think the space Remnants may mostly be operating rogue prior to Process 418 in Venezuela, having used the sanctuary of Nippon during the crash to develop safe avenues for egress into other ventures. I ran a game for aberrants (again) on earth in 2120 essentially dealing with the internal workings of the remnants - how they optimally run without any visible evidence and how tainted members have made this difficult at times. Eventually, most elder, tainted aberrants are lost to remnant authority - like Rushing Mountain around Beta Canuum Venaticorum in AE: Deception, some of these creatures are much too socially entrenched to be safely exiled after so long and in my mind, young stealth-novas were going to be the key to Aeon (and the world) finally bringing these rogues to justice - remnant style.
But, that's just one possible story depiction of the Nihonjin remnants.
Frontier space adventure has its own glorious appeal, you can really pull off the Wild West type space opera in the frontier I proposed. Something I know appeals to alot of people, even though I am more a Battlestar Galactica rather then Serenity man myself.
I'm partial to book sci-fi, but i watch anything i can find in the genre. As someone who prefers a robin hood over a king arthur, i may be a Serenity man - if such definitions must apply.
Not every aberrant goes insane - once the war is in the past new novas are also raised in the wake of that warning and tend to be a lot more conservative and aware in their approach to tainted power. IF they manage to survive, that is.