It would be great to be able to have multiple audiences for multiple audiences in a single test. For example, you have 5 partners and each has 5 discounts. I can run the 5 partners in one test and vary the creative to match each partner, but I can't alter the discount in Target by using an audience. Doing so is another level of audience branching that is not currently possible, so I have to run them as 25 experiences across two pages in one test when I really only want one experience across 5 partners who have 5 different discounts. I'm not testing the partners or discounts. I'm testing the treatment across them.