I believe series order is already possible via one of the template tags in the series-template-tags.php file. I can't remember which one off hand - but it is possible to order by IDs (which is creation date), date, and alphabetical order (series title). If this is what you are looking for the new support docs coming will have instructions on that.
If you are talking about ordering the series in the same way as being able to order posts in a series that is not something that is currently possible (nor do I have an addon ready to release with that).
Once I get the new site up and running there will be a place to put in add-on requests and my development time will be prioritized by the ones that receive the most requests.