...Actually Rho was technically never a guard system (nerd). Omega-56 was though, before the Bounty Hunter Guard became the BHG Core and so the IFF turned into a proper faction IFF.
A big modification on making everything fit properly into Kappa could prove damaging to AI lore and create inconsistencies. The only way I could see it working is if over the course of the next few updates we de-power the AI so much that they're put into a state where they're not even a threat to Zoners. My gripe is that AI protocol is to kill anything that enters Kappa - the AI home system - and I feel that Zoners would never of been able to have had a foothold in which they'd be able to create installations admist this (system changes on a scale like this can be considered retconns and rewrites when no guard IFFs are present. I checked myself and the only base in O-74 with a guard IFF is Livadia Shipyard, the rest are normal Zoner IFFs). And lets also not forget that Kappa supposedly has a significant Nomad presence, which initially eleminated the Zoners from the system in the first place.
I think one way to make this make sense would be an entire retelling of the AI story (which after numerous lengthy and stressful rewrites, including losing and regaining officialdom in the process, I really doubt PRIME would be happy with). I could imagine it like this:
• Nomad presence in Kappa is retconned to be reduced significantly. Maybe even barely present.
• The Zoner settlers of Gammu, after noticing the radiation actually flee the planet sucessfully rather than being shot to pieces by the Nomads whilst they try to escape like in the original story. They leave the robots/AI etc. on Gammu.
• The Zoner settlers construct the bases that were originally in O-74 in Kappa instead.
• Centuries upon centuries later, the AI left on Gammu have developed self-awareness and leave their icy world to explore the stars.
• They meet the Zoners who had fled the planet initially, animosity develops for some reason (kill all beings of flesh?) and the AI begin an extermination campaign. Maybe the Zoners try to step back onto Gammu/Primus again, and the AI react violently Corsair-style?
• Zoners cry to other local factions for help etc as they're really pushed hard to survive against the AI onslaught...
...And then we'd arrive at this 'new' modern layout that's planned for a future release. As you can see it's really not a simple case of dragging and dropping bases into Kappa. And the Zoner factions and PRIME would also have to collaborate on writing this new lore etc. etc. and it just becomes another hassle.
Like I said that's a lot of stuff that'd essentially need to be retconned. My big worry here is that Kappa/PRIME might get shafted the same way Core has been with Rho: the system gets re-designed, there's a lot of inconsistencies that have been added that don't match up with the lore of the system and the faction within, the design itself isn't developed with the faction in mind either, and they get told to get stuffed by the system designer and don't get the oppertunity for any changes. In Core's case, this is getting fixed as indicated by Teerin's post, but I'd be good to avoid having PRIME to go through that same hassle all over again. It also saves the developers time as stuff won't need to be re-done.