One of my favorite things about SimCity 2013 was the ability to customize your services and industry. Hospitals for example could be given more rooms, a surgery center, more ambulance bays, etc. without requiring a totally new building. Now that Cities Skylines is embracing the industry aspect, with logging, oil, etc. I think that Paradox and Colossal Order should add something similar. We can have more industries but also specialized medical districts where we can add new facilities, garbage districts, and even more in-depth water, sewage, and power facilities, all like the new Industrial system. It is far more exciting and unique than placing the same generic buildings in every city.