On the topic of World Building and timeline:
I will be posting a timeline of events that lead to the change in 2026. I've actually already started on the documentation post on our website carrierrpi.mudhosting.net.
The important thing to note, however, is that what happened outside of the gameworld will never be as important as what happens inside it. While I know players want more information about the world their character's come from, my first inclination was to let players make shit up (as is done in quite a few tabletop systems) as they go along, and approve it as long as it fit the theme and narrative.
That didn't last long, however, as people kept asking for more info, so I've started doing a rough overview of what each continent has gone through over the course of the next 10 years. Which, might seem like a short time, but given the fact that we're on the cusp of dozens of scientific advancements this year, I don't think it's that unreasonable that - if everyone ended up banding together in the face of danger (the floods and earthquakes) - they could hit a dystopian golden age. I'd be happy to discuss it further, but I want it to be very clear that my focus is never going to be on the story outside of the play area.
As for group apps: It's massively less about power struggle and more about what fits the lore. Why are three people, who all know each other, disappearing at once? Is it an accident? Is it intentional? Do they compliment each other? How well, is it too well? Those are the kinds of questions I'm asking myself when looking at group apps.
Frankly, don't give a shit about there becoming a power imbalance because of group applications. That's going to happen regardless, what's important is making sure the group applications are thematic and fit within the lore of the world. It's also why - unless someone gives me a really, really good pitch - group apps will probably be limited to 2.