The PPM Works Team noticed a change to Site Creation. Previously Administrators could choose when to create a site for every project type published. The setting was in SharePoint Central Admin for on premise solutions. For Project Online Admins it was located on the Connected SharePoint Sites page in Server Settings.
This setting is now located on the Enterprise Project Type page allowing Admins to decide based on the Enterprise Project Type. Non-complex projects that do not require Project Sites can now be set to Do not create a site while other Project Types can be set to Automatically create a site on next publish. We like the ability to choose between Project Types.
Hope this helps! Please contact us with questions.