I think a lot of people aren't going to bother customizing their backgrounds.Which is completely and utterly pointless.
People complain about ASIs in races, so they make them "floating". Now, they move them to backgrounds, which by default are completely customizable anyway so the ASI are, in fact, still floating; making the "change" utterly pointless.
It's like, when with the devs finally get it. Just make ASI part of generating ability scores or bake them into the numbers by default...
Anyway, bowing out.
And I don't think the change is pointless here. With races, it outright says that you're born better than other creatures in some way. With backgrounds, it says that you managed to improve yourself with time and effort. A noble has gotten a good education and learned manners and diplomacy, so raising Cha and Int make sense. A gladiator has learned how to fight and how to please the crowd, so raising Strength and Cha make sense.