Redefining Blight

"While I would agree that there is much vacant land in the Atlantic Yards area, that there is an 'inadequate street layout' and other problems, the fact is that the neighborhood is fairly vibrant nonetheless. And while I think that the train yards could be revitalized, I don't think that other buildings, where people currently live and don't want to leave, need to be taken over. Is the definition of blighted problematic or is the whole concept of eminent domain the problem? I'm curious to know if there are lots of instances when non-controversial eminent domain usage radically transformed a neighborhood into a much better place."