In Win 7, you can drag and drop items in the jump lists both on the taskbar and in the start menu, to put a pinned item on top of, or under, other items.
In Start8, you have to launch the application and do the reordering on the taskbar, or pin it to the taskbar outright.
It would be nice to have this drag-and-drop reordering on the Start menu as well as in the taskbar.