I'm seriously asking this and not trying to being smart. In what time period has Edmonton's downtown been vibrant and bustling with activity? I do recall the late 80s to the early 90s being pretty good but the struggles of the core have been there since the early 80s.
That being said, I think the core is heading in a really positive direction. The last ten years have been huge for our downtown in terms of development. However, the years of stagnation can't be erased so quickly. The vibrancy we all want for our core is just going to take a lot more planning, investment, people and time. Next 10- 15 years should be huge for this city.
The younger generation of Edmontonians seem to be more open and progressive to change. They'll be the decision makers. They're the one's who'll be shaping this city to it's true potential. The resistance and negativity to change will be removed from the equation.