As for making the figure public and it is pure speculation. It might be an attempt to reflect this on Waymo being greedy - as you might have noticed the by line "just for starters". Most people tend to read headlines and not content. Secondly it might give them an edge during jury selection for the trial.
I have absolutely no insider knowledge and am just speculating.
https://www.bloomberg.com/news/articles/2017-09-06/alarm-bel...
and this ridiculous story of previous version of this circuit board was gifted to departing employee in the form of earrings:
https://spectrum.ieee.org/cars-that-think/transportation/sel...
Both of these stories points to waymo not being diligent in hiding their tread secret or simply did not value this information much. That's why Uber is probably trying to make this figure public to make them sound greedy.
Second, Judge Alsup referred the case the US attorney's office for criminal investigation. If convicted of intellectual property theft (and there's a lot of evidence about this), Anthony Levandowski could be end up in prison for a very long time.
[0] https://techcrunch.com/2017/03/29/waymo-pursued-arbitration-...
[1] https://www.wired.com/2017/05/googles-fight-uber-takes-turn-...
That's just barbaric. Yes, IP laws serve a public good when they're able to balance the needs of incentivizing creative endeavors with ensuring those endeavors eventually end up in the public domain. But it's not even remotely morally defensible to put a human being in a fucking cage for years because they shared some secrets related to making self-driving cars.
The US already has way too non-violent people in prison.
I'm pretty sure he regrets what he has done. About half of his money has gone to taxes and the rest has a way of going pretty fast when you have a Google and DOJ on your back. So, I doubt that he will be fine.