Principles 2,4,6 and 7 stood out to me as the most essential. These highlight the foundational ideas that 1) it is important to be applying what is learned in scripture to actually be living it out and seeing many generations of disciples rather than just being a consumer, and 2) that none of this could happen outside of the power of the Holy Spirit. I think these two principles point us to living out what God is doing.
I’d say that’s been the main thing I’ve learned about CPM/DMM. God has a plan, we step into that through obeying His word, and sustainability happens by the Holy Spirit/the Holy Spirit enabling us to be obedient and not from human wisdom and efforts.