I guess it is all how these doctors submit your package. If your narrative reads like you don't belong in the military and your supervisors/CCs concur, then you are going to be separating. It don't really matter what the disease is anymore. It is all in the wording and what the local doctor and unit wants.
If you PM or e-mail me (through the contact tab on my profile) with your phone number, I'd be happy to discuss your questions. It is a very satisfying career for me, but it depends on the individual. There are part time programs available (usually 4 years of part time study).