The default exposure of repository methods is now controlled via RepositoryRestConfiguration.setExposeRepositoryMethodsByDefault(…). If set to true (the default), a repository that is detected for exposure (which in turn can be controlled via RepositoryDetectionStrategy) will have default resources exposed in case of the mere presence of CRUD methods. Setting this to false will require you to explicitly annotated those methods with @RestResource.
Added RepositoryRestConfiguration.disableDefaultExposure() to set the RepositoryDetectionStategy to ANNOTATED and disables default method exposure in one go. That can be exposed via a Spring Boot configuration property downstream.