We would also very much like to see this done soon!
We signed up for Shopify long ago without much knowledge of websites, but have grown greatly since and it now seems we have outgrown Shopify.
This slow implementation of an important and such basic URL structuring shows Shopify does not value their community's needs!
I will reluctantly begin looking for alternatives to Shopify. I hope to hear back with an aggressive implementation date from Shopify on this so we can continue to be partners.
Almost 3 years now and still no good solution.
The URL structure is indeed very important, shorter the better, especially for Google. Why hasn't Shopify added this feature yet, and how difficult can it be to implement?
A better structure would be:
Some of my websites are in Spanish and or Dutch. Having the word 'collections' would not make sense in the URL
Just give us the option to change the name of 'collections' in the URL.