I love old content. I started playing wow from day one so I have a lot of love for older style instances. I know I am not alone, but I also know there are plenty who disagree with me and think we should leave that stuff all behind. Why? There is room for both tastes to exist. Blizzard has technology already in place to address this, if they wanted to. Why not using their scaling technology to allow a group to scale any instance to a max level instance? This could open up all of the continents and get people scattered all around the world again. And to bring back more social play, only allow premades to use them, and allow for no porting to the instances to bring back travel. Add hard modes to these for hardcore 5 mans(for people who want good gear but dont have time for raid schedules) and why not add add flex mode also to allow friends of 3 to 7 players to enter?
I am just a big fan of all of the content really, especially the older stuff, and think it is a waste to see these old places become ghost towns, when there is a way to make them relevant, and most importantly fun, again.