It would be helpful, in most cases, for environments where custom roles are applied to users that any new grants being introduced for general availability would NOT be automatically applied to users in a custom role. Admins only become aware of the availability after the fact and, in some cases, the lack of awareness can impair consumption management.
It would be preferable if users check with the administrator of their Domo instance to use a feature and the administrator can ensure the feature is relevant to their role or could have knowledge of the potential activity/usage.