We have submitted the support request 2311300050003392. 

The result was that the new version 3 of the bank master, cannot be imported into BC via CSV or JSON without manual intervention.

We were advised to submit our request as an idea: We would like to see a Switzerland-specific adaptation so that the bank master version 3.0 can be imported into BC as JSON without adaptation. All Swiss customers need to be able to import the new version of the bank master into BC without any hurdles.