Scenario:
A Site Design that is applied when a new site is created, should add an existing Content Type from the Content Type HUB (e.g to the Default Document library).

Why?
- site design is applied when new site is created, so that every site on the tenant has the same content type added
- when needed, this content type can be modified in one central place (Content Type HUB), instead of doing it manually on every Site.

Problem:
The Site Design fails when creating a new site, because the contents from the Content Type HUB are not syndicated right away.

Making the content types from the Content Type HUB available right away on new sites would be a great improvement and solve this problem.