For navigation purposes, how about something like setting up one navigational panel, giving you one button access to any device/screen, then put this screen as the first home screen. You just click on the home icon, no matter where you are. It is not one button access, but instead two button access to jump anywhere.

I, at one time, actually created a Table-Of-Contents screen that had buttons that jumped to any device/macro sub-screen. I could get to this TOC by hitting the home button, no matter where I was in the device tree or macro tree. Since then, I have added too many devices and macros and could not fit enough buttons on my TOC, without adding TOC pages.