The short answer is no. We're doing personalization instead of testing. It means that we're applying machine learning pipelines to deliver the best possible / most relevant content (page elements or landing pages) to every single visitor. Like, for example, if a page with product-video works better for people in the evening, and product screenshots works better in the daytime - we'll find this pattern and deliver the most suitable version based on visitor traits and behavior. While with testing approach usually only one variation is a winner, with personalization approach - all variations are the winners, cause they're working great for the specific group of visitors.
Regarding the question about multivariate - we're currently support only A/B personalization (create few variations and we will show the most convertible one) and Split URL personalization (when we're splitting traffic between multiple landing page URLs)