OpenStreetMap

Are you going to map this?

I can, would it also be worth tidying up the residential landuse (dividing at major arterials, etc)?

That's up to you. Having one big residential area is fairly common, especially in country towns. But there is nothing stopping you from splitting it up as much as you want, it's just more work.

Alright, I'll take care of the commercial and residential landuse soon.