Honestly, I am so tired of the "textbooks will need to be updated" headline every time we find a tiny rounding error in space. We are talking about a difference of 12 kilometers on a planet that is 140,000 kilometers wide. If your textbook is so precise that a 0.01 percent change matters, you probably aren't reading a standard textbook anyway.
Don't get me wrong, Juno is an incredible piece of hardware and the fact that we can measure something that far away down to a few hundred meters is mind-blowing. I love that we're getting better models of the interior. But the way science journalism frames every single data refinement as some world-shattering revelation is just exhausting. It is iterative science. It is literally how the process is supposed to work.
Also, calling it flatter is just going to give the "Flat Earth" trolls more fuel for their weird memes. Great. Can't wait for the "Jupiter is a pancake" posts to start flooding the conspiracy sub-communities. Just what we needed.