There are several important changes to take in account:
Dashboard are now bound to a single URL (/users/root by default) and dashboard pages are leaf of this path.
Dashboard lifecycle can be decoupled (create or destroy) from the identity creation in a configurable manner in UserPortalConfigService and exposed in configuration.properties under gatein.portal.idm.createuserportal and gatein.portal.idm.destroyuserportal.
By default, dashboard are not created when a user is registered.
A dashboard is created when the user accesses his dashboard URL.