The real point is whether Google needs to share the information that a small minority of AdSense publishers are demanding. I'd say Google doesn't, because there's obviously no shortage of AdSense publishers. For that matter, how many of this forum's members who are unhappy with the program have actually taken the step of saying "Enough!" and going elsewhere?
Winning the confidence of disgruntled publishers is far less important to Google than winning the confidence of current and prospective advertisers. That's the bottom-line reality.