I think WW confirms that there was always a plan with the DCU movie verse. It's showing you the dark place these iconic heroes are coming from, so that their inevitable rise into the light in Justice League is more powerful.
MoS was all about Clark's alienation; BvS about Bruce's anger; WW about Diana's disillusionment with humanity.
I know people are going to claim that the humour and character banter of JL is a knee-jerk reaction to the critical mauling of earlier films, or the positive influence of Geoff Johns' new position, or Whedon coming in to finish the movie off during Snyder's leave of absence.
I disagree. I think this was always the plan. It's pretty clearly an archetypal hero's journey, extended over a series of movies. What could be more appropriate for these iconic superheroes?
I'm even more psyched for November now.