I would hope that if they go with cool new arena concepts like the bridge seating to give you a more over the action view from up high, that it doesn't get scrapped like it did with Edmonton's. This new venue should be including new things that do work, and doesn't make the venue feel so dated so quickly.
HOK was part of Little Ceasers Arena, so they have the experience in doing it.
MSG also have had it since their renos in 2013.
Looking back at the Little Ceaser's photo, the seating does look pretty steep in the photos for both the lower, and upper bowls. With wanting to pack as much optimal seating and suites as you can, while not taking up too much arena squarefootage on the developed land, I think you could expect the same here for Calgary's.
I think Montreal's Bell Centre upper bowl is pretty steep too?