On PDX, there's a bunch of custom zoning types, and without wanting to insult the people that made them, bc i am very grateful they did, but they are kinda low hanging fruit.
Residential/Office Mixed zone, Medium density office for example are both zoning types where I do not understand why they aren't in the base game.
Same with commercial/office mixed zone, although that one isn't available as a mod afaik.
Also: If at all possible, there should also by a type of office buildings with multiple companies. Larger Office buildings where a company occupies a floor or two.
Then there's the issue with employment numbers. Does it really make sense for some 25 story office tower with a 6x6u footprint to only have 300 to 400 employees when a residential building with similar dimensions has double that number in households alone, let alone actual capacity?
worked at a place with a similar footprint, but only 6 stories and that company had 600 employees.
Office workers, facility maintenance, cleaning, reception, management, security, things add up real fast and if you have 40000m^2 of floor space, then having only ≈400 employees seems kinda excessive doesn't it?