Multiple Tx, multiple Rx Groups.
It would be great if multiple Tx can control groups sets withouts "rewrite" the setting of another Tx.
Tx 1 Control Groups A and B
Tx 2 Control Gruops A, B , C
Tx 3 Control Group B
Now, if you turn on or off a group, the others Tx copy that setting, so the last who choose, wins.
If you can control groups without "rewrite", multiple photographers can share different flashes in the same enviroment.
i.e: Weddings with big dance floor, photography classes in studio, big productions with many flash setups, etc.