My not-necessarily-realistic next step in renovating the dome would be an exterior reclad. Doesn't necessarily have to be red brick like a lot of retro-classic parks (though that would be appropriate for Toronto), but the concrete now just serves to remind people that it was built in a different...
I can tell you from experience that Auckland, New Zealand absolutely does fret about this all the time. And in fact I've seen people here use Toronto as an aspirational case, which is very funny considering how we talk about ourselves a lot of the time.