That´s also my understanding (and my hope). My bet is on heteroplasmic shift though. This will not actually "cure" the disease, but it will minimize its effects. Specifically, I am closely following the work with mitoTALENs [1]. I have no scientific background, but I find this route easier, both technically and legally. Note the Dr. Aubrey de Grey does not agree with me either [2] :)

[1] Mutation specific compounds that will locate and degrade mutant mitochondria. Once degraded, mutant mitochondria will go through the normal cellular housekeeping (apoptosis) http://www.nature.com/nm/journal/v19/n9/full/nm.3261.html

[2] http://www.reddit.com/r/Futurology/comments/28e4v3/aubrey_de...