Legal services can get involved just fine if you file suit. You'll just have to establish that Google owed a duty to you (by contract or otherwise) and that you were harmed by their breach of that duty.
(Roughly. I am not a lawyer.)
(Roughly. I am not a lawyer.)
Less likely here, given the somewhat unexplored territory, but still, the history of class-action litigation evolution is largely of lawyers/firms taking a chance such as this.
I think the overall point here is to have the support of law that says they DO have a duty to you, by benefit of their hosting your account and authenticating you elsewhere.
Then, WHEN someone goes to sue them, the person has much stronger legs in court rather than lone Peggy Sue trying to defeat Google's 300-strong team of lawyers who exist just to eat little guys for breakfast.