the construct devs are obviously programming magicians, but I think the Swf thing wouldn't be a 1.0 feature, it seems really involved, especially since you don't just mean opening and converting to sprites, you mean vector art, which has been suggested many times
if you're richer than me, you could hire someone to develop a plugin for it, I know theres a lot of software that imports or exports flash, so it's not a rare skill