Don't you think the granularity of factorio is what brought its success? Don't you think it would be interesting the mix the sims and sim city for more granularity in the game?
Some fun primary sources:
[1] Will Wright interview for SimCity 2000 CDROM: https://www.youtube.com/watch?v=NcgV4YolDkg
[2] Game Developer magazine piece on SimWorld and early The Sims: https://ubm-twvideo01.s3.amazonaws.com/o1/vault/GD_Mag_Archi... (An old Game Developer magazine piece)
[3] Will Wright shows a very early The Sims demo at Terry Winograd’s Stanford seminar: https://searchworks.stanford.edu/view/yj113jt5999
It's doable more than before.
I got many ideas how to do it, don't hesitate to hire me as a game designer :D