For a year now Twitter has said that the service's mainstream appeal could be broadened by making major changes to the product. But after a year of changes, it's becoming clear that isn't happening.
On June 11th, it will be one year since Costolo left his CEO post and Dorsey returned, promising radical change. And Twitter today indeed looks different than it did a year ago. But it remains unprofitable, its user numbers are flat, and its chief rival, Facebook, is looting it for parts (and executives). For a long time pundits have called for product changes to fix Twitter. But after a year of changes, it's time to acknowledge that Twitter's problems are much larger.