When will be a new firmware available to set a fixed 2,4 channel? And also to set the connections between the decos eg only powerline or WIFI ?

I have a Sonos installation with an own SonosNet. I want to have maximum distance between the channels but this is currently not possible as the Deco is changing the 2,4 channels all the time.

The communication between the decos is also an issue. I have a deco connection to another deco which is on Ethernet. Both are connected also to powerline. The Deco which is not on Ethernet quite often uses WIFI with a very bad connection to the other deco despite the powerline connection.

The result is that the speed is extremely slow!