It would be helpful to have a way to reorder entire columns in the email builder. I use a three-column layout for upcoming events, and I often find myself needing to update the order of these events. When this happens, I end up manually dragging each element to the next column (which can take a bit of time).
There is a workaround for two-column layouts (using the LTR/RTL buttons), but I haven't found a good solution for my particular use case.