Howdy!
I recently began working with the ArcGIS API for Flex, and was surprised by this issue. Being able to layout an application using "drag and drop" elements can certainly make things quick and easy. I'm not complaining, as I prefer to use ActionScript when creating Flex applications, but in some cases, it would be nice to use Design View when working with the API for Flex. I see it's been a while since anyone's commented on this thread, and it piqued my curiosity. Any news on this issue yet?
-Amy