The current design is Plain
We is one of the first major dystopian novels, and has inspired other great works such as Brave New World by Aldous Huxley and 1984 by George Orwell.
A major theme of the novel is that of logic reigning supreme. Citizens of the One State live their lives on a tight schedule, and don't allow for any emotion to guide their actions.
The protagonist, D-503, is unable to deal with his emotions when they rise. Like many of the citizens of the One State, he has a wall in his mind between his logical and illogical self, and he constantly struggles to stay on the side of reason. This wall mirrors the wall between their nation and the savage lands that lay outside, where people are completely primal.
Another aspect of We is the notion of total government control, and especially of government surveillance. The architecture of the One State shows this: everyone's houses are made of glass, so that they can be more easily watched by the government.
We shows the disastrous effect of trying to forcibly remove a major aspect of human nature from a civilization. Living without emotion, refusing to embrace a lack of logic, turns people into automatons, just shells of their potential.