So much of this is common sense. What happens in nature? Where do more nutrients come from in October? The plant's energy is going towards finishing the fruits, vegetables, seeds, ripening.......not leaves.
At the end of the day, we're producing resin trees. The plant is the thing on which the resin lives. All extracts are extracts of resin, not plant matter (although there may be some other good things from the plant itself, much of which is better for eating than smoking). I think chlorophyll is actually good for us.......but probably not to smoke.
One question would be.......what nutrients are needed to form and maintain healthy, large, potent resin glands? What can we do, add, not add.....to get the most amount of resin? And same goes tor terps, etc....