I'd like to see monorail removed and made into actual subway, with a subway station at the actual subway by PD, as well as at the side of car dealer, coming out where the car dealer park is now. I'd also move the station at suburbs from where the monorail station is now to behind the bakery near storage. I think this would make it more convenient for new players to get to and from the high traffic areas when they either don't have a car, or when they've done something stupid and wrecked it.
Also add something like a laundromat property that you can buy where the suburbs monorail is just now. I think that would make subs a bit more interesting.
I'd have the monorail station at business be replaced with a small hardware store that sells a few bits and bobs from the uncle cos store right now, and maybe basic melee weapons like hammers and hatchets for a heavily marked up price over crafting prices. I don't think that would be too annoying, given that the gun store sells baseball bats already, and would make sense for a hardware store to sell hammers and hatchets, as they're primarily tools.
TL;DR
Monorail bad, subway good.
EDIT: Make the laundromat be called Lewis' Laundry or something for long time retired admong LEWIS 088