You are in my opinion, Joe. The mixing of radio functions has increased in the recent years through programming of the TX. In the old days circuits were created to mix functions like in the Tacking Process stated in the Manuals. Then there has been the dual stick set ups like for the Nautical Commander or German modifications to the Robbie control system. These are legal within the rules like Joe says.
Many use a tacking sheet system that suits them. This is not a problem. As long as you are not violating the printed rule, you do not need to have an email exchange to get online.
Charles, you have a go. Just do not violate the printed word regarding the four items of control like Joe had presented.