Possibility to arrange "modules" like categories, tags, etc around the field for text-input.
For example: I don't use tags in my blog, I prefer categories. So, I would like to place the category-box next to the write-box, perfect would be the old place, right to the write-box and it should be opened by default.
Great would be something like the widget-configuration-panel.
Different authors have different needs, so, let them decide how the write-panel-elements are arranged for best work flow.