3D, I want to commend for your vision and leadership in designing and pushing 'Cathedral Square.' There's a real lack of good public squares in in this city, and, certainly, nothing like the grand European-style piazza you've designed exists anywhere in Toronto. A 'Cathedral Square' development would be a significant contribution to the public realm through its size and design, and it may help revitalize that part of the city.
You've found the right location, at the right time, and you've got a winning design. The site is a huge parking lot; the owners are willing to sell the property; and you've designed a distinctive European piazza that fits perfectly over the site. Perfect!
I have two questions regarding your design, however:
First, why place two tall towers so close to the square? I feel that the towers would dwarf the square. Rather, I think your concept works even better without the towers.
Second, why close the square? (This is one of my beefs with Nathan Phillips. The upper concrete wall around the square is an eyesore and walls the square off from the city.) I think the concept is strengthened by removing the fence and opening the square to the city, which it tries to be a part of.
That's just my two cents.
Again, 3d, I want to thank you for taking the initiative to think of ways to improve the public realm of the city. I hope that one day Toronto will have a public square as beautiful as the one you have designed and proposed.