I just saw this in Preview I've given plenty of feedback to product management regarding this screen and whilst there are still a few things on our wishlist, the ability to group by role is fantastic!!! (and I didn't even know it was coming). This will be a big carrot to encourage our users to use the new WOC rather than the Legacy WOC.
The reason I believe this feature will be so useful is because we heavily use multiple roles and our scheduling team often have a need to review what resources are working on when they are looking for someone to perform a particular role. Now the resources show up in each section for each of their roles....excellent.
Well done Product Management and Development teams! Looking forward to seeing further enhancements of the new WOC!