In FHIR, the 'event' pattern only allows one 'author'.  This is the entity that takes responsibility for the creation of the record.  In the case of a person working on behalf of an organization, there is only one author - the practitioner.  Their association with their organization is always captured through PractionerRole.  If we were to have multiple authors, that would indicate divided responsibility - some resting with the provider and some with the organization, which both isn't the case as well as being something we wouldn't want to support. The need to traverse through resources to get all desired information is a standard part of FHIR implementations.  It would not be appropriate for Questionnaire (or any other resource) to 'fudge' the data representation to eliminate a need for resource traversal.