In Studio, you can open the inspector and view the SQL Storage Map on %Persistent classes. Can you do this in Atelier or do you have to read the XML text? If it doesn't currently exist, are there plans to include it? The inability to perform certain functions in Atelier that can be done in Studio can be a 'point of conflict' when asking/forcing/encouraging developers to move to Atelier.
There are no plans to implement an equivalent to the Studio SQL Storage GUI in Atelier. The use case for the SQL Storage editor is to maintain legacy applications. The development team's primary focus with Atelier is to support new/more modern development.
If your day-to-day work requires the use of the the Studio SQL Storage GUI, the InterSystems recommendation is that you continue to use Studio.