I think this would be great if they could do that.. but when it comes to millions of users I dont think even google can handle that much feedback publicly without falling seriously short. It's amazing they are able to address as many issues as they do, after all there are like 14000 open issues right now in that tracker.
You're focusing on the wrong numbers. "Millions of users"? You're talking about 14000 open issues, a FRACTION of which were closed.
The android team is large and the closed bugs surely have been reviewed by the team before being closed (otherwise they're just closing randomly in which case: WTF?). So really, doesn't it make sense to give an actual reply for even just the more popular ones? We're not talking about millions here, we're talking about dozens...
