It's all posturing until someone figures out how they're going to add a workable third option to what May will take to Parliament. Only one I can see is inserting a vote to instruct the government to withdraw Article 50 (and I'm open to being told that's impossible on constitutional grounds). Which obviously won't succeed without a major shift from one of the two big parties.
The EU position is that if the UK wants any deal, it will have to accept ECJ jurisdiction over legislation covering goods
and services. The ERG and other hardline Brexiteers in the Tory Party are driving the process with a core red line of avoiding having any kind of ECJ jurisdiction over services, as that would open the door for the EU's ATAD to be enforced. That's why May's Chequers plan made the concession of ECJ jurisdiction over goods.
Thankfully, the EU has so far stuck rigidly to its guns in refusing to countenance a deal without ECJ jurisdiction over services, as it knows the eye-boggling levels of money laundering that goes on via London into the BOTs and Crown Dependencies, shielded from tax authority view by the veil of secrecy deployed by the BOTs and CD's.
I just hope the EU doesn't bottle it, and maintains its stance.
But those groups opposed to the industrial scale use of BOTs and CDs to dodge their tax responsibilities and hide beneficial ownership should have been shouting about this for the past two years, to build a narrative that a small minority of the very wealthy, the hedge fund shysters, and the other parasitic scum in the financial services industry who employed by them, are driving Brexit.
So when the Brexit shit hits the fan hard and the UK economy tanks, anger is turned on these wankers.