I'm not exactly sure what kind of training I could recommend.
One of the biggest problems is communication. I just find that communication is very slow, and frequently, for me—and I'm pretty sure I've heard this from other people—it's waiting to hear from VAC acknowledging that they've even received your message in the first place.
It's slower than it was before. That's for sure. I think it is definitely slower. I send a message, and it doesn't even get forwarded to anybody for five days.