Second Specs review for Variant Option Product Options

I used this app to sell prescription glasses. After having all the logistics set up I am finding we are having trouble converting shoppers into buyers. I would like to add some information at the checkout page for my customers but there is no way to do this. Because it uses draft orders you are limited in several typical Shopify features such as customizing the check-out or using discount codes (unless you purchase an additional app). We also found that customers are not able to go back into their order/cart at a later time and make adjustments without starting the process over. I did contact the developer via Shopify and told it is not possible once again due to the system of using draft orders. The product has potential, but the fact that my customers do not progress past the cart page and I have no way of providing an encouraging message is frustrating.