The other example of selectivity in doctrine based on the Pali canon is the doctrine of dependent origination. Dhammika says:
"There are two versions of this doctrine--one showing the arising of suffering, and the other showing the arising of liberation and freedom. The first of these ... features in virtually every book on Theravada... The second, and one would think the more important of the two, is virtually unknown, even by learned Theravadins. ... Carolyn Rhys Davis called this positive version of dependent origination an 'oasis' and asked, 'How might it have altered the whole face of Buddhism in the West if that sequence had been made the illustration of the causal law!' Indeed, how might it have altered the whole face of Theravada in Asia?"
I find that this type of analysis raises tantalizing possibilities. It seems there's a wealth of doctrine to be mined from overlooked segments of the canon that could do much to enrich our understanding and practice of Buddhism. This would make an exciting and rewarding project for scholars--really, a potentially great gift to mankind, or at least, Buddhist-kind.