Increase the amount of people living in the CBD. Inner city housing build above shopfronts (restaurants below homes). Bikes for hire from all main roads/side streets. Subways. More venues (stages). Parks, fountains and streetart. Markets by the river. More bare-breasted statues ;)
I WANT to be able to take people for a walk down/across the river.. but I doubt anything will ever make a walk around Pinky Flat.
Id argue for opening the Garden of unearthly delights for the sunny parts of the year.... Rundle Street ends in a pretty large empty park!