The new dashboard works fine for me. I like it that now the post window fits my screen better I don't need to scroll down. Moving tags to the top right and adding "Choose from the most popular tags" were great ideas too. But I also have a couple of nitpicks.
One is about the publish button. Why is that "delete" is closer to the editing window? I think it should be either underneath or to the right of the publish button.
Second I noticed that just below the top black border where it says "Dashboard" or "Edit Post" and so on there is a lot of white space that can be filled with most used items such as "new post" or "new page" that is now hidden in the menu on the black border. And please add back the link to forums instead of having inside the help menu.