Once returning from shopping there is the convert to inventory button which in one click adds the entire list to your inventory. So there is no additional work to do there. My vision is a quick few clicks to populate the shopping list from the inventory screen without having to flip back and forth between screens, and without having to select fermentable, or hop, or yeast for each item, and then type in the description to find each item.
It isn't a must have, just thought I would suggest it. I do most everything on my phone, so going back and forth has been cumbersome. First world problem to be sure though