No to be abrupt or an ass about this, but these assumptions that we have a complete game with nothing else in the pipelines needs to end. This isn't your typical "beta 30 days before release" when 99% of the content is complete.
In software development, "beta" simply means that you have a working product, not necessarily feature complete. Just because the public doesn't see the full beta period of game development doesn't mean that it doesn't exist. This is why game development doesn't typically have public beta test periods until a few months before release.
As far as the OP goes... great effort and looking forward to the fruits of your labors. Maybe we can piece together some formula for purity changes with enough work.