One thing that I use a lot in Audition on windows, and have been doing since the CoolEdit days, is the keyboard shortcut of toggling between files to be active in the waveform editor. Very useful when cursor/selection across files are synchronized. On windows that is done by ctrl+tab. Are there plans to include such toggling in the mac version?
On Mac, you can bring up and navigate through the document switcher by holding CMD and pressing tilde(~) If you hold SHIFT you can navigate in reverse order.
You must have more than one file open for the switcher to appear, a fact it took me several minutes to realize when I was confirming the key combo.