If a user doesn't have access to a particular record but is made a transition owner, can that user execute the transition and edit the record too?
Blueprint overrides the field access rights set for a user. For example, if a user has Read-Only access to the Amount field, but needs to execute a Transition that mandates the Amount field, he or she can update the amount while executing the Blueprint transition. At all other times, the user will continue to have Read-Only access to the field.