From my understanding the styles are gone but they will come back later in a better form, alright good to me, drag and drop sounds nice.
In the meantime I hate the fact we don’t have a preview of the margins for 9 slicing (image as box), its a very frustrating regression. How about adding it in the hot fix?
http://puu.sh/ceaY9/858a17674a.jpg
(my dear 9 slicing preview)