Having your cake seems to be what Labour want to though. As with all negotiations you never get all that you want. A lot of this decal meets what Labour said they want as I understand and Sir Kier couldn’t say what a better deal would look like so they are purely trying to sieze power which at this point is beyond shitty of them.
As for the Tory clowns, I think they just want a no deal, to sever ties completely which only they think will be good. They might get their wish though the way things are going.
From what I heard from your commons right now, Labour wants a Norway plus type of deal, which I think will immediately provide more certainly but freedom of movement won't end. However, the majority are against a no deal. But they don't want this deal. I think you'll soon have a general election or at least some kind of coalition government. Just getting more and more interesting.