Currently the header space is wasted, as there is nothing basically. Here what i mean.
At this momnt, the several primary used actions are “nested” (hidden) inside users avatar icon. For beginners, it would be difficult to find them, unless they are luck to click the avatar icon. As we have ample spaces in the header on the top, better to present the list of action. One reason is not to waste the space, and make the actions easier to find out.