Getting access to ORDER BY for data-series x-axis

I've been working on a data-series chart that can give us an idea as to release quality (story points vs released defects that require patches), and with some help, got it working.

There was one last thing I couldn't do though, which was to specify the order of the items on the x-axis.  It seems there's still no way to get to ORDER BY when you don't want to do the natural sort of a given property, and when the x-axis is made up of cards, that restricts your naming ability.  For example, we like to give our releases descriptive names rather than 'Release 1', and I'd rather not change just so that one chart can be ordered correctly.

It seems like it would be a good thing if, when the x-axis is a card property, you could pick a shared property of the potential card types to do sorting on.