I would rather there be guaranteed liability: have the execs set up a legal system to refund the entire order book and voluntarily plead guilty to federal charges in the event of another > 10 MAX deaths. But frankly, if Boeing is at fault for 340 deaths they should already be doing that.
That said, it seems likely that in the US Boeing is liable to their customers (airlines and aircraft owners) for fraud. In theory, the entire organization could be disbanded under RICO, but Boeing is a defense contractor, so more likely they pay to settle damages. I could see them getting away with paying for the costs of repairs, retraining and the lost revenue for planes already delivered in the US.
It also seems likely that Boeing is spending incredible amounts of money on PR to control the fallout. I expected the release of this report to be near the top of Reddit, but on reddit's /r/news the BBC report on this was sitting at only 21 net upvotes after 3 hours. (As of 8 hours ago.)