As an honest publisher, I also add my voice to those here in this forum that think that it would be very helpful if Google News would tell publishers why their site is removed. For example it's one thing that you want to not tell a blogger, but if a site that has a reporting team of 6-10 people it's another thing.
Perhaps it is best if you establish a criteria when to tell and when not to tell. example, if a site has minimum of 10 reporting-team, perhaps it's worth telling the site the reason so they can quickly fix. No one is infallible and it will be much appreciated if because of a single or small oversight 10 families don't loose their daily bread.