It would be great if this button would appear after woocommerce variations but still before the add to cart button.
My understanding of how It would work to the general person is they click the product, they are on the product page, see variations for options, choose the options then customize the look. Once they've done that they ready to add to cart. However I think at the moment people are seeing the customize button before the variations and clicking it. doing the design then clicking add to cart and not realising they have to select variations in order to add to cart. It would just make the flow a lot better if you could add the customise button after the woocommerce variations? This my suggestion but would be great to see what others think.