One other thought- I remember reading about the development of English stadiums over the past 30 years or so and one point I came across many times was that they were forced to increase their ticket prices to make the games an upper middle class event instead of a low middle or worse class event (which would bring violence/uncontrollable crowds and all that fun stuff from the 70s/80s in England). I remember thinking about that as TFC was increasing prices the first few years. I wonder if they priced their actual fans (and young adults who want to be fans) out of the stadium simply to try and preserve a family friendly environment (a CLASSIC mistake from MLS 1.0). Remember we were the first of MLS 2.0. It's very possible some of the same mistakes were made here that were in the older markets, that have been repaired in other cities.
As for a stadium upgrade, the phrase lipstick on a pig comes to mind. Jays fans packed Exhibition Stadium for years. As did Argos fans. And my vague recollection of that place was it was a toilet. I don't think shiny things and bright lights and fewer exposed beams would draw more people to come back. A solid product at a reasonable price will though, unless they completely burn all bridges here. Which is the big fear.