I think what would be MUCH more productive is a PR effort to show off really large, well-done Flex apps in enterprises. Developing really large apps in Flex is much easier than doing the same in HTML/JS today. Even if the framework might lend itself to some bad practices, or if we don't have best practices defined to teach people really good ways of writing large apps, it's still the case that making a well-designed, really large enterprise app, and working with a large team of developers, is a hell of a lot easier with current-day Flex than HTML/JS. Everything from how you organize your code, to continuous integration stuff, to IDE support for large code-bases... hell, just having packages to organize your classes!
Flex's problem is not that it's not a viable option for very large enterprise apps. It's better than almost anything else (for desktop web apps of course). That's not to say that there aren't improvements that can be made here, but with the limited resources that will be devoted to Apache Flex, I'd hope that instead time would be devoted to areas where Flex fares worse than competitors (performance on mobile, as just one example). Just my 2 cents. Doug