Flash was originally designed as an animation tool and it is in many ways superior to edge animate. The only problem is of course the lack of html export support. Just add the option to export to SVG or HTML5+javascript to flash and you have a much greater tool.
http://en.wikipedia.org/wiki/Adobe_Flash
edit, and just a quote from wikipedia:
Adobe Flash continues to be a favored animation program for low-cost 2D television and commercial animation, in competition with Toon Boom Animation. Notable users of the software include DHX Media Vancouver for productions including Pound Puppies and My Little Pony: Friendship is Magic, Nelvana for 6teen and Clone High, Williams Street for Metalocalypse and Squidbillies, and Nickelodeon Animation Studios for Wow! Wow! Wubbzy!El Tigre: The Adventures of Manny Rivera, Danny Phantom and Happy Tree Friends . Flash is less commonly used for feature-length animated films; however, 2009's The Secret of Kells, an Irish film, was animated primarily in Adobe Flash, and was nominated for an Academy Award for Best Animated Feature at the 82nd Academy Awards.
The message: Improve Flash for animation!!!