Adding my name to the list. I'm really surprised that the developers made such a big change when they have such a mature installed base.
At the very least, please give us the option to toggle the preview pane. I think it's quite absurd that this is the default, baked-in view, when people are using devices with smaller screens and/or may simply not wish to see a note preview.
It's not the end of the world, but it's kinda cr*ppy. Like Evernote just became a chair with only three legs.