I'm aware that we know pretty little about the experience point system in Minecraft 1.8 and i consider this as a suggestion once we know more about how the experience system works.
Suggestion:
Would it be a good idea that building machines could give you experience points, or some form of experience? Perhaps that more advanced machines requires higher experience level to build?
Perhaps there could even be a technological experience level beside the regular experience, if possible that is.
Leveling your technological skills together with your amount of resources could be a fun challenge. It would be a good thing if it was toggle-able though, for those who just want to build IC1 style.
