While UI tweaks definitely aren't the top development priority as of now, the header currently feels a bit cluttered and unintuitive. When @ernest does get around to improving it, here are a few changes I suggest:

• Add a number next to the All Content tab like the Threads & Microblog tabs do. This would help make what it does much clearer.
• Add a number to the People tab if possible. Right now, it's not at all obvious that this tab depends on the magazine you're on, and giving it a number like the Threads and Microblog tabs would help communciate that.
• Have something I can click to pull up a list of my subscribed magazines and favorited collections. Maybe include that list with the current channel list button (the one that lets you select between All, Subscribed, Moderated, and Favorites).
• Have a notification bell that you can click to see notifications, like what KES does.
• Replace the Magazines & Collections button with a single tab, which could be called "Explore" or "Browse Magazines". I'd combine this with my suggestions in this post: cleaning up the sort options and just having 3 tabs for magazines, abandoned magazines, and collections.