Sims Team: How to Support Rotational Players AND Open World

I like this concept, it reflects how many players progress their sims world in Sims 4.

As for not wanting the world to age at all, that could easily get incorporated into the proposed system by allowing us to leave the primary slot empty or fill it with a throaway sim. I'd just put all my households into "Other Played households" and maybe put the mayor, landlord or other public figure into the primary slot, where I'd never touch them again.