Now, the other side of the coin, the Mercedes Benz Stadium replacing the Georgia Dome is a step up. Going to the building itself will be an event, regardless of what you're doing inside it. Back when the Georgia Dome was proposed, the original design was so much more than what we ended up with. Nearly all the concourse glass was deleted, the large four corner lobbies with ground to roof glass were eliminated. There really isn't anything endearing about the dome the way it is now to make people sentimental about it. That being said, it's still a tremendous waste to tear it down.
Some of the ideas to renovate the GA Dome before the decision to build new. A large east/west video board. Natural light openings along the top ring. A large eastern glass lobby with a window to downtown (the four corners were originally supposed to be like this).
The original renderings of the SunTrust Park were much more encouraging than the current design under construction. They seriously backslid on the nice and crammed in the corporate nonsense like Comcast.