Basically Christchurch’s heritage has gone, but that does not mean that the buildings cannot be rebuilt in the same style, but better to stand up to time and mother earth.
Imagine New Christchurch, renamed as that what it will be, at every City block the glass in the newly rebuilt buildings will change to a different colour of the rainbow. So the window colours would start with red, the next block from South to North, orange, then yellow, green, blue, indigo and violet.
So in the day you would see when looking east to west along a road cutting across the city you will see a rainbow of reflective coloured glass. At night in the winter though the City will change to a magical rainbow of buildings as office lights are turned on. Imagine when the city is restored tourists will come here not just for the skiing in winter, but to see the City light up. It will be one of the most photographed cities in the world.
This is not the only thing that would set the city apart. As you have coloured bands of buildings you would also have bands of flowers in the hues of the blocks. In the red zone would be red poppies, red geraniums, etc; in the orange zone marigolds, orange Californian poppies, etc.
So a stranger asks you how to get to a building it could be something like, go down Kilmore until you get to Blue and then it is second turning on the left.
Buildings built after the earthquake would have the coloured glass, but any built previous would not be allowed unless they were compliant with the building standards of the new buildings. This way you could tell if a church was a heritage building as the glass would not be coloured, but a rebuilt “heritage” building would have coloured glass.
If the Cathedral is going to be rebuilt there is no reason why the others should not. They would be memorial plaques set in entrances to the buildings honouring the people who had lost their lives on the site.