You're kidding right ? Hullmark's 200,000 square feet of office is being marked as condo offices i.e. it'll be full of small business (dentists / doctors / small lawyer firms / ...). Other then that - when's the last office building you've seen built here, I think it was 2004 and before that was likely a good 5/10 years ... and this is during a building boom.
Power center ? I couldn't think of an opposite word to describe it, it was built like this to start and did have a lot of success early on but has been eternally stagnant for the last 6+ years (with 0 growth whatsoever) and even if you look back the last 15+ years it's been 1 office building.
Moreover, hullmark was just about forced to include an office component - note that I think they sold well but again only to very small firms due to the condo nature.
There is no office growth in Toronto outside of the core as sad as that is (even along all the subway lines) ...