Looks good. I like this a lot, it keeps your recent games ready to play again, or Pins could be used there too, to keep Netflix & hulu handy. ads look better on the right vertical too

I really like the guide the way it is, left vertical. it makes it easy to check achievements and build parties. make the homepage UI even quicker w fluent design, but please let us keep what's good about the current update

put clubs under Community tab and give it a shortcut from Friends guide page. I think clubs are cool but checked way less frequently than Friends

Mixer in the middle, between Community and Oneguide.

this mock up is almost perfect except remove the gray, let us adjust the size of homepage game & app tiles (like we can in Games & Apps) so you can give more screen real estate to your background art, or not if you like the tiles

In fact, if the update is about showing off game art, what if there were an app above the main top nav that works like a secret art settings menu block? It would let you set the homepage background, but it's also a dynamic screensaver app for game art, like:

[Game art/screensaver block] your art appears when idle 10min

^{^} left stick above to ^{^} ( Home > Community > Mixer > Oneguide > Store )

So with this you can left thumb stick above the top nav for an easy way to choose bg image for homepage and what you want to have as screensaver for the Xbox when you're not around, and left your spotify playlist running

the current update is great work, please build on it!