Odd. I have the new type setting on my Voyage. I had to look up what kerning and such means when the update was first mentioned when the PW3 came out so I know what to look for now. Enhanced editions that I re-download to my Voyage have that kerning thingy and whatever else the other stuff is.
Now not all books have that enhanced font thingy and I have one book that says it does, but won't come through with it on my kindle. I'll delete it again and download again to try again. But even without the enhanced stuff it looks really good.
I don't have any i thingies and I haven't checked on my Fire or Nexus about that since reading on a tablet is just not comfortable for me. I just have e-ink or my eyes hurt. So I can't speak on how it looks on a tablet. But on my Voyage, the new typesetting is there.
Sounds more though that someone just likes to rant at Amazon rather than ask them.
I have screenshots I took of a book with bookerly as it was on the device and then I deleted it, downloaded again and took another screenshot. I can clearly see how the Yo in the word YOU is different. The o is closer to the Y. I'll see if I can figure out how to get those images on here.
eta: Sorry, it doesn't seem to work to get the images up