Prolonged campaigns for better terms can make a tangible difference, and we should be encouraged by this result to advocate for even better terms. It turns out that when they have real pressure, it is possible for Google and Apple to come up with better terms.
Keep in mind that the reason Google is being sued for antitrust isn't because it was taking 30% -- it's because it forced manufactures not to install or bundle any 3rd party stores by threatening to remove access to the Play store if any competing storefronts were enabled by default on consumer devices. So this doesn't change the original complaint, but it's still a very big win for smaller developers.