I think becose Muse don't have HTML code section, this forkflow is not effective. Personally, I use Muse + PS (or FW) > DW (as last editor).
Please check this small video of how fireworks can be sync with Adobe Muse, http://tv.adobe.com/watch/muse-feature-tour/muse-roundtrip-editing-in-photoshop-and-firewo rks/
You also have an option of placing a photoshop button in Muse, which detects the layers in the photoshop file to be used for different states.
If you have a different suggestion I recommend that you add it to the ideas section over here, http://forums.adobe.com/community/muse/ideas
- Abhishek Maurya