While I may have srewed myself over by putting 8.1 on my 820, I still have my 520 for purposes just like this. In opinion, I have officially bricked my 820.
I'm sorry, but a notification center and custom tile wallpapers just are not enough for me to care. Music is my #1 priority in a mobile device, especially since I spent the $100 on Xbox Music integration. I honestly cannot believe that anything would make me clamor for the old Music + Videos Hub. The new version makes the one on Windows 8 look like Zune. I'm going to have to stick with the 520 for a while because I just cannot spend the money switching back to Android or even an iPhone. But I'm really disillusioned with the entire Windows Phone project. With every push, while Nokia makes strides to improve the user experience, Microsoft does nothing but impede its progress as a modern and logical mobile operating system. It is painfully obvious with the 8.1 preview (which, let's just be real, is the update everybody else will be getting) that Microsoft is no longer trying to be the alterative OS; it is merely copycatting Android and iOS and doing what I think is a really poor job of it.
Time to sell the Lumia 820, I guess.