The issue seems to concentrate more on the age of those who have to suffer the heat.By these descriptions Toy Story Land's exterior sounds like the unshaded furnace that is anywhere and everywhere outdoors in Future World, and Woody's Lunchbox seems akin to the entire Food and Wine experience of waiting in outdoor lines for food and then having nowhere to eat it.
I'm not trying to say these are acceptable issues, but that similar issues seem to be accepted elsewhere (in fact, isn't there a constant arguement about removing the little shade that they did add to Future World?)
And of course that it’s a brand new facility in a time when covering lines is considered the norm and necessary.