One thing the Vong and Thrawn have in common is that the best thing about them was that they forced the heroes into very different situations/rise against different threats than previously faced.
The other is that most people who talk about them clearly haven't read the books.
The Yuuzhan Vong were the first thing written out by Disney's Lucasfilm because they force a paradigm shift.
When "Literally Nazis" are the deterrent for "Literally Chaos" AND instrumental to getting rid of them, were the Rebels really the heroes for opening the gates to them?