I hadn’t realized the ramifications of this until today, but I really hope the Start menu isn’t the one planned for the final. Although it’s not super easy to do, the current one in Win10 is fairly customizable, and enables some pretty useful setups.
I’ve used this personalization ability to build start screens for several people with disabilities, with the end result is that they have a consistent launcher with large visual tiles, so they can get to their applications, websites, and games more easily. It’ll be a real shame if none of that ends up being possible anymore.