They didn't have those changes ready. My team got them ready, in a damn hurry and under great stress so that deadlines could be met. Before another reprint could happen without incorporating anything but what would inevitably be called token errata. I handed in nearly eight pages of editing notes with changes, some minor, some decidedly not so. Nearly everything in the Errata forum for this book? It's official now; I haven't updated the forum post or compiled the errata sheet yet, but that's on me. I'll get that fixed, I hope soon, but until then, it's mine.
Things aren't yet where I want them, but we're so ridiculously ahead of where we were as little as six months ago.
Again, I'm sorry if the efforts that my team of volunteers and I have made to date aren't sufficient.