Canadian stadium trends are odd. If costs are an issue you dig and build a single teir of seats on the northern end. You can make a single tier in a horseshoe. Yes, I'm aware that endzone seats are not prefered but it makes more sense to spend less money to build your cheapest seats. The fact there is substantial vertical seats shows they are not serious (or smart) about saving dollars. Single tier as much as you can is the way to go. You can provide various ammenties and design features to break up the seating.
Price sensitive fans who want a game day experience will buy the tickets. Nobody in Regina or Winnipeg complains (if the team is good), it is more about the height and angles of endzone seats IMO versus the seats being 15 yards back versus an American Football stadium.
In the modern age it's about the premium options. Giving 10k fans the experience that is marginally better than going to a U Sports game isn't going to be sustainable. Once the new car smells wears off and if the team performs poorly, and/or weather becomes unpredictable fans will just watch at home versus sitting on some bleachers in the wind and cold.
CFL'S biggest competition is the TV as there is very little incentive to pay some of the prices you see to go watch a game when you're TV has HD and a warm couch to sit on and much more affordable beer.
In the USA, new modern stadiums have been pushing to expand ammenties and the fan experience as they understand they are competing with TV and other entertainment options. For some reason Canada has been slow to this. I partly blame the dominance of hockey in Canada as likely, many sports industry executive professionals who advise on such things come from a world of irrational demand for the product where fans (hockey) will take dog food and warm beer and be content.
I fully understand Halifax is working with a shoestring budget but you can be very thrifty with design and still get a good end result. MLS is full for examples of cheap stadiums that balance fan experience and the needed requirements of the team from both operations and revenues standpoints.
Salt Lake City is a comparable city to Halifax in regards to its size and metro, their MLS stadium was built on the cheap for about $160 CDN when converted and adjusted:
-Layton Construction
You can notice there is minimal upper deck as going vertical adds considerable costs. What likely happened was the necessary addition of media or skyboxes created a natural support point to add a small deck and they put very minimal upper decks in place similar to what Regina did with Mosiac.