I could say I am really, really, really sorry, and that it's true a lot of people are really, really, really busy (what with other projects, shows, yadda, yadda) and so on - but you have a pretty good grasp I think.
Fact is, I've thought it was pretty much done a few times myself, and then it's been revised and enhanced in meaningful ways. I'm quite sure Don felt exactly the same way when he wrote his post at the end of December, and there's no desire other than to make it as good as possible and then get it out the door asap. From where I sit, there is not a great deal left for that to happen, but I've thought that once or twice before. It's tempting to go out on a limb and speculate, but it's not my place to either do that or make promises.
The only good part of all this is that it is, in my personal view, a better package now than it would have been if released even a month ago.