I know what you're getting at as far as the setback is concerned.
Here's an image of what the front of the hotel will look like:
There will be a plaza in front of the hotel (facing Canada Street), and I wonder if part of the idea was to mirror the plaza in front of the Avenir Centre to complement and maximize the public space in this area. This is speculative, but I wonder if this isn't something the architect was planning on..........
There will be no setback on the Main Street facing facade. The hotel here will be flush with a widened sidewalk, and will contain retail frontage.