We've updated the test creation experience.
After selecting your test type, you’ll see a high-level overview of test creation, offering you the choice to start by either selecting participant criteria or building out your test plan.
Subsequent pages give you a “blank slate,” where you can select elements from the sidebar to build out your audience groups or craft their test plans.
Once your test is built out, the overview page gives you the full view prior to launching the test. This is also the view that you will see if you decide to "Create similar test," allowing you to quickly identify and navigate to the parts that require adjustment. Then click Launch Test and you're done!