My "guess"
Is that if there is an update it would have to be a completely new remote head, at least to get the features you mention.
The colors would most likely be a hardware change, red for green.
As for turning the radio of remotely, the way it's built right now, the remote head has a serial only connection to the radio. If you shut off the radio with the RH, you lose the connection to the radio and would not be able to turn it back on with the RH.
You could, as others have, add a power switch to the RH, then route power to the radio through that switch. As for the red/green display, I am definitely considering the idea of opening the RH up and changing the reds for greens.
jeff.