Keep in mind that, like the application forms, the emails are generic. There is no exact list of what people must tell CIC, as some things that can affect one person's app won't affect another person's app.
Your family changing their address or your wife changing jobs would have no effect on your app, so there is no need to tell CIC. If it was you who changed address or if your wife had to go on welfare because she lost her job, that would affect the app, so you would need to tell CIC.
