I don't know if I'd go that far. I was walking along City Hall's north edge yesterday, and on nice sunny days, with the fountain going, and the plaza occupied by office workers instead of the homeless, it is a not-unattractive space. The concept of a public space on multiple levels with multiple access points is actually an interesting one, but probably not well-suited to the particulars of that location, ie: isolated by six-plus traffic lanes, hidden from the street, and with only one adjacent function (office space in City Hall).

A redesign, if it ever happens, should take advantage of Dilworth's assets - central location and transit connections - and add in more uses: recreation, civic space, a cafe, etc. Perhaps some rooms in City Hall could even be redesigned to open onto the plaza. Possibly a new name, either more general (West Penn Square) or accessible to contemporary users (Thunda Plaza)?