it depends on the weather. They haven't finished the top layer on both north towers. concrete should be between 10 degrees when setting. once we hit freezing, temperatures can't pour concrete.
You CAN certainly pour concrete in winter and high rise construction does not stop in winter here but it needs to be done properly and the extra precautions cost $$. See: https://www.foxblocks.com/blog/pouring-concrete-in-cold-weather
sure it can be possible but i dont think they are doing it. other projects I see are not pouring more concrete and I dont see time and space pouring more concrete.
Concrete pouring will certainly continue, as @DSC said. Construction does not stop in Toronto for winter, it just adapts.
Even the really ugly ones have no problems finding buyers/ tenants. I have yet met someone who refuses to buy/rent a unit in a building because it's ugly, although I suspect plenty of UT members would.
I think most people are more concerned with the aesthetics of the neighbouring buildings that they have to look at every time they look out their window, than how good their own building looks.
Sure, people are selfish and what you see from your window is important. Nobody wants to see a junkyard, railway tracks or smoke-belching plants from their living space if they have a choice. But I doubt there are too many people who say "I don't want to live in this building because it faces an ugly building"
They are more likely to say "I do not want to live in this building/neighbourhood because there is this huge "thing' looming over it and there is less sunlight." Aesthetics are much more subjective than 'darkness'.
Which building?