Two years ago I had a lengthy phone conversation with Laura, our host rep, when she first took over that position. She had initiated the contact, asking for input. Among the many things we discussed was the need for Airbnb to send us notifications when they changed or added anythig, instead of us just finding out by accident or from other hosts here. She agreed that it was needed and that it was the respectful thing to do.
Here we are 2 years later and it's business as usual. They have no problem sending us proddings to lower our prices or unblock dates to get more bookings (like we have them blocked for no reason) but notifications of changes seem to be somehow impossible.