Hi Candice,
Sorry to hear that you didn't see the time savings in Stitch compared to making updates in Shopify. Many of our customers really appreciate the ability to keep their inventory in sync across multiple channels.
Also, we have just released the ability to allow a single channel to serve as your master of inventory with our Channel Stock Control feature. You can set listings from your sales channel to be the Master of Stock quantity over a warehouse in Stitch. Learn more in this support article.
-Bridge