Hi @loginerror,
Actually I’m using 19.7 and its kind of solved there! which is absolutely fantastic.
The only thing I’ve noticed is that its user specific now (when I delete .local folder, the Root Directory is gone as well)
Would be great to have it in project.json just to make sure all the users accessing the project (e.g. from git) are on the same page and deploy to the same root directory (unless they want otherwise)
Anyway … its ok the way it is now 
Best Regards,
Filip