As someone in AZ that keeps their thermostats between 78 and 80, I almost always freeze when I go into a hotel room. However, if you're from the Midwest visiting WDW in FL, where the humidity is high and the temperature is also high, you should be able to cool off in queues for rides. The absolutely highest I would raise the temperature in the southeast is 75. A temperature any higher would keep it relatively humid.
There is no reason that Disney should be setting the temperatures high as anyone would north of the sun belt is going to feel it.