Having to move/re-rank backlog items one at a time is tedious. I'd like to be able to select multiple items and move them to another position on the current page (I like to see a bunch on the page at once), or to a specific position in the overall backlog (position 230 for example). V1 would move them in the current order that they are, to that new position, starting at the position entered. Or you could allow a user to select multiple items and then drag them down the page as a group (but currently once you get to the limits of what items are visible the page doesn't automatically scroll to allow you to continue.)

Or if you have multiple child stories connected to a feature and you rerank features at the portfolio item level, the children should be prioritized too?