I would be OK with that. The original idea was to have it more or less be consistent with the other three region-specific groups already created for Canada, which are all labelled by the city. I'll be happy with whatever is chosen, because it will be a great improvement over nothing at all.
The Montréal centralizing in Québec is definitely a distinctly Canadian urbanization phenomenon, as the same kinds of complaints expressed by out-province Ontarians are made of Toronto/GTA/GGHA, and when I lived out west, much of northern and eastern B.C. was showing resentment toward Vancouver for taking so many of the capital budget projects (I left about two years after the 2010 Olympics announcement).