On MS flight sim when using Fsinn server module you can assign frequencies to TS and change comms via the sim. This is handy because you don't need to minimise the sim, which is even less practical in helicopters. Perhaps DCS could support this.
PS
TS also has command channels which are a must for large exercises. Even with these you have to keep down the banter. Mato, Squadron leaders, pilots, atc and ops commanders all trying to talk over each other can get a bit much