This feels like a game-changer for me. We are keen to get booking to some safe destinations (relative to the UK) as soon as FCO advice permits. Not too worried about cancellation costs etc because we always book non-flexible and just suck it up if we can't use the booking for some uninsured change of plan.
But a potential foreign intensive care bill is a different level of risk, even if the likelihood is low. BA-Allianz is more expensive than my current annual worldwide cover but too bad.