Reporting on multiple A/B test emails

We're using A/B testing to try out a new email design and prove that it's the better option.  To do this, we're sending to 100% of the audience, but 50% receives the old version, 50% receives the new.  We'd love to be able to see how version A performed across multiple email sends versus version B.  It doesn't look like Marketo lets you combine these test results into one view, so we're pulling the data from each dashboard and organizing it ourselves.  I know it's not the standard use of the A/B testing feature, but it would great if reporting were more robust!