I too would love to see a change log, but worry that it would cause more V3-like responses with each update.
I understand why manufacturers don't say, "we have a new product coming out in two months to replace our previous version." When they do that, all sales stop for two months. But in the same vein, when a new product gets a surprise release those who just purchased a short time before feel taken, that if they had known they would have waited.
Physical products are not like software in this regard. If a new version of a program comes out right after you buy, you can usually upgrade for free. Smaller bug fixes are always available for free to registered users. So the analogy isn't 100%.
