In fact, we already have. It was my decision that PG should out me as moderator, and that was mainly so I'll be able to answer users' questions.
I think your points are mostly correct and entirely understandable. Qua user, I feel pretty similarly, so I don't anticipate much trouble seeing eye to eye about this in the long run. I'm optimistic that we can eventually please both the bulk and the core of the community—though that will still be far from everybody.
Also, there's no one on the team arguing for secrecy. The question is not whether to be more transparent, but how.
A few points from the moderation side.
You should know that what appears to be HN's "secrecy" has in reality mostly been extremely limited bandwidth. For most of HN's existence, PG ran it at the same time as he was building YC plus having two kids. That made for an awful lot of dropped packets. One might argue that he should have handed HN off sooner, and one would in my opinion be completely wrong about that. So without HN's "secrecy" there would have been no HN.
Second, it's been true for a long time that you can get answers by emailing info@yc. (We're going to change that to hn@yc, but that's not up yet; I'll add it to my profile when it is.) I'll be taking over the HN-related emails from Tara, who has been valiant but will soon be relieved.
I intend to be a lot more responsive in the threads, partly because we know that community concerns around transparency need addressing, so we'll make a priority of it, but also for two non-obvious reasons: (1) I've written software for navigating and moderating HN very quickly, and (2) I type faster than PG.
Beyond that, there are a lot of questions about how to get this right. Many of the factors aren't obvious. I have more to say about this, but this comment is long enough, plus I'm tired and my brain hurts, and we'll have lots of opportunities to discuss it further.