To address FastJack's point, up the BP cost of the awakened qualities a decent bit. Recognize how much harder it's going to be for people to get their spell formulae, and mark up prices to reflect.
Same goes for most technology, too, short of maybe a few points of civilization.
Best advice I actually have is: go look over
here and pick a different system to try out, it's not evil. It's just better to use a generic system, or a system designed for post-apocalyptical worlds than to try and brutalize a system that is fairly beautifully developed for its setting into fitting a very different setting.
Short of that, try and consider the impacts of infrastructure breakdown on resources and qualities (a la magic, above).