The 6 test thing was a logical starting point, an entry into the issue of whether can we get social democracy and a decent degree of regulation inside the EU or outside (to be clear, I don't believe you can get either, but I'm talking about Labour's analysis and strategy). It should have been about the world they wanted, the active campaigns they sought to build and the rest, but just became a defensive way of dealing with brexit in interviews. They've waited for the tories to fuck up and deliver the keys to number 10 to corbyn, largely through McDonnell or Starmer coming out with varying statements and minor shifts. But it hasn't worked. For all their fuck ups, the tories are still in power and, even now (to me at least) are favourites to win the next election.