When relationships break up its hardly one persons fault or the other. I'm inclined to think Brian is still a great coach, but just not very experienced in handling the break ups.
It seems what may show up tommorrow is fallout from Yu-na's music being revealed. Supposedly there's an article in Korean with a statement from David Wilson about it. It seems David is very angry that Orser did this without even talking to him. This could get very messy. And it goes to show why even if you are the injured party its still a good idea to think before you speak.