One small thing that could be a big thing is an electricity overhaul.

There are so many opportunities in an update like this that could add more functionality and role-playing capabilities to Bloxburg.

1. Electrical outlet interaction

This could allow Bloxburgers to actually plug in things like devices, appliances, or landscaping tools.

1. Functional circuit breaker box

This could allow the homeowner to shut off power to, say, an individual room, or even a roommate (if they're not paying).

2.1 Light switch assignment

This could make light switches in Bloxburg work like they do in real life.
Now, I'm no scriptwriter or developer, but I believe, especially with how good the Bloxburg dev team is, they could make a simple menu system that opens when placing switches in build mode, letting you assign them to things like ceiling lights, ceiling fans, bathroom exhaust fans, etc.

1. Lighting overhaul

Now this one might be less feasible, but the lighting in Bloxburg has been the same for years, and I think it's time for an overhaul. I feel that reworking all lighting in-game to be more realistic would be awesome.

Stop light from shining through walls, ceilings, or floors.