It seems to me that Google could take an example from Amazon. All communication between their customers and third-party sellers goes through Amazon. That way Amazon regulates any possibility of dispute, refund, etc. With that process there would be no need to publish the private addresses of small developers.
Personally, I am sick to death of going beyond feedback to email or snail mail a developer only to hear from them never. I do believe that one should be able to expect return communication within 48 hours. Right now, no one is being held accountable to respond when a user deserves an answer. Here's a good example: I am completely addicted to Strata, a game that won awards last year and has promised upgrades which have not appeared. It is tied in to Google Play Services, so we also get points. I have a perfect score all the way to the end of the game. I just want to know when to expect an update, that's all, nothing mysterious. I'm starting to think it's become abandonware.