Things might have changed since I used to sit on appeal committees, but at that time the standard was repentance or lack thereof. In the majority of cases I was involved in, we overturned the decision of the original committee and the original committee accepted our decision. We could see repentance, whereas they didn't.
I realize this goes contrary to mamochan13's unfortunate experience, but if his/her appeal committee's report had included, "The appeal committee . . . believed I was repentant, but that since the elders had followed the correct process, my dfing would be upheld," I believe the Service Department would have intervened. They do intervene and make the final decision if the appeal committee and the original committe cannot agree on a decision, or they see some other flaw in the process.