Here is one app that’s in need of some UI changes and speed improvements. I would love for...

I still need to work out how to customize the UI on the Xbox One X since the last update. It's still a lot of boxes and the community section has gotten worse with more clutter since the last update. But they make changes to the UI every month. Once you've
got used to something, they give you a surprise the next month to try to adapt to. But the speed of the UI is a massive improvement. UI performance will always be superior and far better on an Xbox One X console due to the more powerful hardware. There is
very minimal and negligible GPU and CPU and HDD speed improvement between the original and the S models. Both have the same 1.75Ghz processor and the same 8GB DDR3 memory.

yeh, its quite a popular idea,

xbox.uservoice.com/.../6514179-xbox-one-notifications-really-need-improvements

With the new UI, when it comes i'm sure there will be some major changes.

Since joining Xbox late 2010 I've noticed they've redesigned the UI a couple of time. And Windows 10 comes out late this year.

I love the current Xbox 360 UI. I'm not really a fan of the Windows 8 UI. I think it's too boxy and snap-py. Microsoft is really listening to feedback for PC versions for Windows 10 and rolling out the return of the Start Menu which Windows 7 has and I love.

Microsoft does need to make changes and improvements to the UI and OS. After all, it is the essential piece of software which helps protects against viruses, malicious activity, and to reduce problems experience with Party Chat and loading friends list.
It also has to be kid/youth friendly too and something which little kids can use without continual assistance. Xbox 360's UI is like this. It's not just middle aged adults on here. I don't mean to age discriminate. Rolling out new features and keeping them
can slow down OS performance. Just look at the performance speed wise for starting/shutting down hardware between Windows XP, Vista, and 7. Vista rolled out a tonne of new features and it's still crappy compared to Windows 7.

What I would like improved is accessing messages/friends/achievements quicker. A UI/OS performance shouldn't be solely based of your ISP speed. Sure Friends use active tiles. I'm glad you can add what you want to the Dashboard background. And please, try
to make things less boxy. But if they can have the UI/OS performance as good or near that (better) like how 360's current UI is which runs on much less RAM and weaker hardware, than that's good.

Xbox 1's UI is better than what it was like at Launch - By Far! At Launch, it was taking around 45 seconds just to open each app, 45 seconds for Friends, 45 seconds for Messages. Now it only takes around 2-10 seconds. So there is a software performance improvement
there. I don't listen to peps on here who say "ITS YOUR INTERNET". Many peps have ADSL and not VDSL or Fibre Broadband. Even being on ADSL, my Windows 7 OS on my HP Pavilion dv6 is pretty snappy regardless of ADSL speeds. My household's ADSL average 10.9mb/s
down 0.9mb/s up.

Since Xbox 360 has had a lot of UI changes since it launched, there's no ruling out Microsoft won't do the same for Xbox 1. Microsoft roles out many Updates for it's supported products to help improve user experience.

I would have to say the UI on the xbox one has improved over time, messaging has also improved and now with xbox one pass, play anywhere and cross play its only going to get better from here on in.

Some interesting features here even if it doesnt include the UI update as you've mentioned. I really hope that they take the time they need to focus on speed and optimization before rolling it out.