The Hill is black, by choice. Are you suggesting that whites should be forced to move in or a few Asians and Hispanics?
The Northside is the largest section of the City of Pittsburgh. Geographically, it covers more area than any other and more than many combined. Within that area, there are numerous all white, all black, and mixed race neighborhoods. How would you change that and why?
East McKeesport is a mostly white middle class neighborhood. It's not a part of Pittsburgh and is actually quite far away. Why would you include them in 'Pittsburgh'?
Are you from the 'burgh? Are you familiar with the layout? Do you know why almost every neighborhood name ends in 'Hill'? Pittsburgh self segregated since the beginning as immigrants for the same part of the old world moved close to others who spoke the same language and shared the same values and culture?
Are you suggesting that there is something wrong with that, then or now.
And I'll add, many of the neighborhoods are geographically defined by rivers, streams, hills, mountains, hollows, bridges, railroad tracks. The topography more than anything dictated the design (or lack of) for the Burgh and Allegheny County.