So We are glad to hear Shopify have finally allowed merchants to set shipping rates across zones - which can be used to set specific rates for specific product groups. Good news!
The bad news - I can't find a way to easily include the rates on product pages, so essentially the customer will only ever know the rates applicable at checkout.
Displaying shipping options & times at the product page level is now common practise and why would I need another 3rd party app if it's already there in Shopify?!