Played around with it even more today. Deleted everything except my recently played stuff and my "pins".
After a while it felt a little too empty so I added a club (Awesome screenshot club), the store, and Mixer. I think I added "Community", too. I like seeing what my friends are doing. I may tweak it some more tomorrow but I'm pretty happy with it.
With that said, if you showed me a screenshot of what it's like now and what it was like before, I doubt I could tell you what was changed.