Mitochondrial diseases don't seem like an easy target because they are really metabolic and homeostatic disorders, which are very complex. If the main failure of mitochondrial disorders were a lack of energy production, how could cancer cells grow faster than regular cells, yet turn off mitochondrial energy production in favor of anaerobic glycolysis and lactic acid fermentation (which is much less efficient)? Mitochondria have an under appreciated role in ion homeostasis, intermediary metabolism, and biosynthesis that seems to be the cause of many mitochondrial diseases. The mitochondrial genome only codes for a few proteins, but relies heavily on the nuclear genome for proteins. In other words, the mitochondria isn't just an isolated power plant; it's an integrated system that provides power in addition to logic, material processing, signaling, etc. Sorry to hear about your disorder, fortunately there are people researching these diseases.