I think it all looks great with the exception of white-spectrum LEDs as far as the eye can see; the natural lighting of the past Notre Dame during early morning was special -- maybe it still is , but the white LEDs everywhere make it look 'clinical' to me.
I obviously haven't visited Notre Dame yet, but when I visited the fully rebuilt Berlin Palace last year I did get an impression of "this place needs to age a couple hundred years before it's done".
The Notre Dame is a historical building. It's not meant to look like "new".
The same applies to paintings
Same for glass windows, which in old times haven't been as clear as today possible, but still lighter than after centuries of dust settling.
(Incidentally, this is related to why there are gargoyles on cathedrals. The church building is a microcosm of the cosmological universe. On the outside is untamed wild, which is where the monsters are (a monster being something we do not understand or cannot integrate, hence the abundance of chimeral combination of multiple animal and/or human parts). Inside the church is where the Kingdom is, with a baptistry at the beginning, because you enter the Kingdom through baptism. Then, the masses of the people in the Kingdom. And originally the altar was behind a screen, which represented the holy of holies, where God is; now this is often represented with a raised platform for the altar.)