I wonder whether or not work from home could be a opportunity in a roundabout way. Instead of having 200-300 in one central office building, could the number of workers downtown increase but just working out of multiple apartments and co-working spaces? Is a permanent base of downtown workers not better than one that leaves the core every night?
Downtown living is a lifestyle. Living car-free, eco-friendly, walkable, close to shops, cultural amenities, festivals, cafes and restaurants. You can get very close to that "Downtown Toronto" lifestyle here for much cheaper. Places like City Centre can serve an increased population and can be an employment centre serving everyone, not just office staff.
I realize that the push for more people to live downtown is happening, I just think that it can be better leveraged in a way to help offset the commuting population.