Guys, please allow me to chime in.
The Freestyle machines in the park have an advanced filter in it. The city water going into the machine is filtered before mixing with the syrup because Coca-Cola wants their soda to taste perfect and maintain their brand integrity.
Therefore, when you press the "water" button you are getting filtered water. We live in a world where you pay for filtered water, and it's been free up until this point.
The Freestyle machines (and their filters) were not designed to supply all the drinking water to 30,000 park guests in the hot summer. They were designed to sell sugar water.
If you want water, there are water fountains at EVERY restroom location, and food locations will give you water. Nobody is taking away your free water.