There seems to be a reasonably even divide between those who would continue and those who would divert, with good reasons given for both choices.
Each case would be different and it would be a command decision at the end of the day and as always, the Captain carries the can and needs to be able to justify his decision.
It would be difficult to write the rules in absolute terms so some leeway is deliberately left in the regs. A bit more guidance would be useful to fall back on for those who end up in a similar situation in future.
Landing at the nearest suitable airport is a safe decision which won’t involve problems with the regulatory authority, continuing to destination could also be justified based on current thinking.
Previously, twins couldn’t operate across the North Atlantic, these days traffic is almost all twin because the rules changed.