I have not had the run in with ads that you have. I have seen a Subway ad and that is pretty much the only ad that has nothing to do with something that is available on the marketplace. I actually like it when they advertise for movies and shows and dlc for things on the marketplace because perhaps I did not know about it.
I enjoy that they show upcoming events.
I enjoy Netflix immensely.
I enjoy the fact that titles now have much more information available. Screenshots, videos, description, DLC is available from the game's menu as well.
I enjoy the new UI and find it VERY easy to get to what I want.
The only thing I do not like about Avatars is the fact that I cannot make it obese. That would be hilarious.