I love the 2.0 addition of action buttons!
I use toggle on softkeys for many different toggle situations. One example being to set the stream mix to come from FOH or an X32 in another room.
The issue I run into is definitely at startup the softkey in toggle action mode will glow the wrong color at times making me think I am in the correct mode but really am not. If I press the softkey once it usually gets back into the correct state.
Possible solution:
1) It would be great to change the color of the button as part of the defined action
2) Trigger the softkey button status based off of actual state of a mute or a particular setting so the feedback can be true to state