Well reasoned. However if it looks like May is going to try and go for unilateral repeal of the A50 activation, 48 letters will be handed in at the office, one by one, with witnesses and a press statement within the hour.
In the end it all comes down to fear. If it looks like the leader of the Tories is going to go rogue and override the will of the people to avoid a battle, she'll be gone by tea time. There are more than enough anti EU MP's who will lose their seat if she does that.