When reordering items in lists using drag-and-drop:
List items should snap to the item level. Currently they snap to the line level, which means you can accidentally drop a list item right in the middle of another list item (if it spans more than a single line).
Sub-items in multi-level lists should behave the same way, but they don’t snap at all and instead can break up text at any point.
Oh shoot, I wasn’t even aware of that shortcut, thanks for the tip! In that case, add that to the list of requests here – for the Move Up/Down key commands to take child list items with their parent item.