The e-commerce and payments giant officially rolled out its website redesign, the biggest change in its history. eBay first introduced the new features, which it says creates a more personalized experience, in October. Since that time, eBay has allowed site visitors to opt in for the new design. Starting yesterday, users no longer have the option to use the older design, but eBay says the new site is "more intuitive." One feature, dubbed Feed, curates a user's favorite items on a personalized page and displays the images in a setup very similar to Pinterest's layout.