PS - if you think a city designed by architects would work, just take a look at Park Hill - a brutalist vision of hell (IMHO) designed by a very highly esteemed (sic) architect!
The old Broomhall flats were, like the other new council flats, partly inspired by an esteemed architect, Le Corbusier. He was a very famous and indeed very good architect and Sheffield City Council decided this was just the thing for modern urban living. Like Park Hill flats, this was a "city in the sky", a truly modern, 20th century idea. The one thing they didn't take into account was the shoddiness of those actually building them.
They were essentially a kit, and therefore easily assembled. The walls were made up of concrete panels that were to be edged with rubber baffles, and that's where the problems started. The builders had to put the rubber baffles between the slabs, but sometimes they dropped them from the scaffolding, and thought that as it was too much of a waste of time to fetch another one up they'd miss the odd one out. This of course meant that the waterproofing of the concrete seals as designed by the architects wasn't there in many places.
Then there's the concrete slabs themselves. Designed to be a simple steel-reinforced slab, the steel reinforcing frame wasn't always placed correctly when the concrete was poured, and so the steel was exposed rather than covered. No worries thought the makers, the rubber baffles will sort that out.
So when a combination of no waterproofing and exposed steel met the British climate water got in, and the steel started to rust. The flats inside were damp, some actually had water running down the walls inside, and they were also very prone to getting mouldy, and this caused lung and respiratory problems for many of the residents.
What started out as a grand idea for utilising one of the great modern architects of the last century ended in money wasted and people's health affected.
Check this
link from the Yorkshire Film Archive for a film and article on Park Hill.