I think this model is missing a critical component: the bodies ability to use energy effectively is limited by having the proper nutrients available. The easiest example being a deficiency of B vitamins since they are used for energy metabolism. Many other factors can impair energy metabolism and just eating more will not fix the situation.
Whereas with this model we have statements that seem too over-simplified:
> The organism’s energy consumption capacity is biologically limited
This seems overstated- we know that certain athletes can consume 2x or even 3x a resting amount to support physical exertion- the human body seems designed to be able to produce more power for physical exertion when needed by consuming more energy (in addition to making long-term adaptations to make energy usage more efficient).
I also think that readers of this paper may take away an understated understanding of the possible negative effects of energy deficiency. Any physiological problem could be impacted by energy metabolism. For example, even if something is known to be caused by a deficiency in a nutrient that cannot be synthesized by the body, it's still possible that improved energy metabolism might be able to reduce the usage of that nutrient in some pathways to conserve more for where it is needed.