@LugubriousInfinifactorium is a successor design to Infactorium, but the actual factory will remain the same. So, the Gorging Trough, for instance, won't be scraped, but instead extended into this new section under Mae's direct control and design; in essence, Mae, as with the others, will be ascended from just Overseers of their Factory to Supervisors of two full floors, and obtain the title: [Miniboss], as opposed to [Elite Mob].
As for expectations? I have none, beyond be creative with your characters and your space. Circling back to Mae, she could use her new space for farming, and create an unique day and night cycle to raise Darkness-touched plants and animals, or use the depth and pressure to invent new cooking styles and modifications to the buffs and debuffs over her food.
The possibilities are endless. But, I have no desire to levy expectations on any of you, so you aren't pressured to preform. Just work within a reasonable limitations, as the additions are new, and not yet known to any of you, until the new cycle. Faetalis has been working in secret on this by just telling Gammatron what she needs dug out, and telling Tungsten how to construct the elevator; you'll be getting your keys in the next GM post.