CONTROL WATCH WITH JUST BUTTONS
[Starting with v9.44] you can assign any function to the single and double press of the 2nd and 3rd buttons of your watch (if it has those). Please read the next post for more on Shortcut assignments: https://plus.google.com/b/111815032990260235809/+BubbleCloudWidgetsWearLauncherInteractiveWatchFace/posts/CxQ6pZfSEZV
If you assign a folder to the button press, you will be able to keep using just the button to select and activate bubbles in this folder.
The folder in the example contains Smart Light bubbles, of course this works the same way if you have apps, contacts, or any other items in the folder. Having folders stacked inside each other you could access all your bubbles just using this one button!
Watch this video if you need help creating folders: https://youtu.be/5dFHhCs5dXI