Are you building apps in a modular fashion where those modules need to support different Flex versions? Do you have nightmares where Alex is explaining SecurityDomains and ApplicationDomains and SWFLoader.loadForCompatibility?
Please let me know (email me at mcho...@adobe.com), we're trying to evaluate some pain points and whether I need to bribe the Player team to solve them ASAP or if it can wait a release. Matt