Interesting that Apple isn't touting this
They only talk about it being quieter. They already basically admitted the previous butterly keyboards were crap, by giving those extra extended warranties, so they are pretty well protected from class action suits (if Apple is repairing it for free, you don't have much to sue about)
I wonder if this is because they aren't sure this will really address the problems, so they don't want to claim it does only to have people start reporting the same issues? They'd have considerable egg on their face if they did. While it isn't a good look to appear to not be doing anything about a publicly acknowledged issue that gave them a lot of bad press, if it turns out it is fixed they don't have to keep quiet about it forever...