Yeah, some are freaking out and others love the change. I am not messing with the cats of any of my old books. I will just pick the 3 cats with new books. They did remove a cat I used which makes no sense since it was a popular cat. I emailed Amazon about it and they said they would look into it. Why would you remove a cat, I have no idea. I have heard others have been removed while newer ones added. It is what it is. I'm fine with the change if it makes categorizing books easier and they do give more choices. More cats to try out and things. But they did this because so many people were abusing the system by having their books added to several extra categories even when the books didn't fit. I doubt this will stop all the abuse because you can still stick books in the wrong cats and I highly doubt Amazon is going to be paying attention, but it puts everyone on an even playing field now. We all only get 3 cats and that's it. As for the adult box, yeah have to check it now but some are panicking thinking their books will be hidden, stuck in erotica, or the dungeon, this isn't true. It's so much fearmongering on social media about this but of course what would the indie world be without fearmongering?
So it's a big change but like everything it's hard to work with change but we'll adjust and will probably like it better. I know I will if this keeps authors from stuffing their books in the wrong cats and taking space and visibility from authors who belong there.
As they say, "bank over rank". I focus on getting more visibility OFF Amazon these days than on it. Even being in KU that's my mindset now. Meaning doing promotions in other places and bringing folks to my books on Amazon so I don't have to depend on Amazon's algorithms to show my books. I don't do AMS anymore, etc. But it's getting clear that with the addition of ads and all the other changes on Amazon now, you can't depend on Amazon for visibility whether you are in KU or not. And with the change in categories (I'm being positive in giving it a chance and thinking it could work better for authors) it's more reason to have some type of marketing plan that does not focus so much on Amazon or the rankings. Contrary to popular opinion you can make pretty decent money and don't have to be in the Top 100 for every single book.
This is another thing that I feel will show authors not to put so much stock in the visibility and algorthms at Amazon. That way, when they make sweeping changes, you can handle them better.