It'd be great to see an activity feed of what's happening. For example, Item X went from 1 - > 0 due to an inventory change in Etsy, Item Y went from 2 - > 1 due to an inventory change in Shopify etc,.
Add Google Sheets as sales channel
Will allow updating stock levels on Google Sheets and syncing that to your sales channels by SKU
Hello! Just a nudge to suggest you look at CraftyBase as a possible integration -- there's a whole user base out there using CB with Etsy along with Shopify and similar, just waiting for a great solution. :D
Google My Business / Google Shopping
Love Trunk. Makes Integration much easier. Perhaps add a channel for Google.