The current functionality of exporting IFCs from iModels is a great time saver. It would be much better if instead of providing a JSON file with the class mapping (see attachment), the web had an user inteface for such a common task.
The documentation for this remapping functionality as-of today (https://communities.bentley.com/products/digital-twin-cloud-services/itwin-services/w/synchronization-wiki/55909/modifying-default-mapping-for-ifc-exports) is also not intuitive for non-technical people, as designers and BIM coordinators might not be familiar to the Bentley-specific ECSchemas and ECClasses.