i have ptsd, and i couldn't imagine why anybody would think that ecstasy pills would be any sort of useful treatment. it rather speaks to the purpose of modern psychiatry, which is just to get people addicted to drugs they can be sold and then convince them that feeling high is equivalent to being happy.
while i might enjoy mdma in a party setting, it would almost certainly trigger me into an episode in a controlled or clinical setting. that is a bad trip waiting to happen; the premise that it would be some kind of treatment is absurd.