Considering how HTML websites and apps are prototyped and designed these days either in Photoshop/Fireworks or by hand-coding and refreshing the browser, why do/did we need a third kind of tool that lets you layout an app, but not really design or code it? Also I used to like the idea of a design view, but it quickly became useless for dynamically laid out or very complex screens, and once you really knew MXML it became superfluous.
So I don't see the point in reviving such a thing - I would prefer to see better support for vector assets in Flex, and better support in Flash Pro for mocking UIs and exporting meaningful symbols for Flex. Many designers already know Flash Pro too. Lastly, with Falcon on the scene, would't it be possible to emulate the hand-coding/browser refreshing style of development in near realtime? It should be possible to build a live preview of your app that incrementally compiles changes and displays the latest version running. This does depend on how the app works, but if that was available it may well be worth decoupling screens such that they can be layed-out this way running in a preview shell app, before being included into the real app. Gary McGhee @gazmcghee EmberJS/Flex/Ruby developer
