A question I can actually answer! The best source for this is the book Inside the Third Reich by Albert Speer, if you haven't gotten a chance to read the book it's a marvelous look at the inner workings of the Nazi bureaucracy. Speer goes into great detail about the new capital and the break between Hitler's vision and reality.

Long story short (if one is to take Speer at his word) there were no formal plans for the new city besides pure aesthetics. Speer goes into detail in his account of the main Boulevard for instance, about how creating it in the visual manner Hitler wanted would basically create an unwalkable concrete city with no pedestrian life. Even with the supreme power the Nazis held in Germany early feelers to establish the zoning blocks ran into problems with local officials, businesses, and ministries as they vied for space as to who would have frontage access in the capital. Rerouting the public transit alone became an ordeal for Speer to coordinate, much less the massive shift of roadways and traffic routes which would be necessary to accommodate the construction. In short, even with Hitler's control there were so many intersecting layers of interest in the new capital that it wasn't just a matter of giving orders and receiving compliance.

None of this was of any concern to the Fuehrer, however. He was much more focused on his legacy and left the details to men he trusted. This meant he spent his time envisioning monuments and great works, the idea being that even after the Reich fell people in the future would still gaze upon those structures with wonder. That his vision was impractical for a living city didn't bother him in the least, that was for everyone else to figure out.

There were attempts to create worker housing and public spaces in Nazi Germany, but this was under Speer's direction in order to improve living conditions of the average citizen.