It’s important to establish a solid connection with the ground. Creating tension through our feet and lower body sets us up for a good pull. Its difficult to do so with shoes that have a lot of cushion and elevation – they also create instability. A stable foot becomes more important as the weights get heavier.
Deadlifting with a raised heel shoe will shift your weight forward. This forces you to work harder to stay in a good position. We want our weight evenly distributed through our feet as we pull.
Deadlifting barefoot allows you to feel the ground which makes your pull feel better. It will provide better feed back for areas of improvement – leading to better progress.