"So either her legal team said 'Yeah do it' or they said 'You probably won't win' and she did it anyway. "
I doubt they said either of those things. I've dealt with loads of lawyers and the biggest problem one ever has with them is that they never give you a clear steer, or definitive advice. They say this could happen, or this, or this, this maybe more likely than this , but that could happen - and YOU have to decide based on the risks they explain.
I work in HR and my job is the same. Managers say 'but will it go to tribunal?' and I have to say it depends on many factors, 'well, if it does go, will it win?', no idea, depends on loads of things, this and this and this, and that and how the judge is feeling and what they had for breakfast......
I can't imagine for one minute that any lawyer she was using didn't tell her all the risks. She knew her husband best, she knew better than they did how he would react. And she chose to appeal, and appeal again - no-one can have forced her to do that.
Anyway, she's only got to wait about 18m now.
I agree divorce laws need reform. But I also think people should try and understand it better before they get married (never married myself, never seemed like a very good idea really)