Update to Safari in Mountain Lion screws it all

I updated Safari and I don't like it at all. Now the window is similar to Google Chrome's, and Voiceover reads things differently. When in facebook, I used to activate the heading list and check all the news on my wall. Now I simply can't do that, half of the headings are not read, but if you go element per element they are there. It is impossible, but is there a way to downgrade Safari? As you can see Mavericks is not the only problematic thing, Apple is forgeting accessibility.