You keep discounting things that count. While they may not have cut your pay rate, you might be maxed out in your current pay range, and you won't get a raise for the next 10 years. Be more careful about how you say things. Also, I'm just not so sure that "insufficient training or skill to be promoted," is going to get the ALJ to see that you were demoted plain and simple.
In all probability, no one from your company is going to show up, and if some one does, I doubt it's going to be an attorney. They'll send your supervisor or someone from HR. The company's testimony will amount to, "the claimant should be denied because she voluntarily quit." No one from EDD is going to come in this particular type of case.

