While I realize that it was not eligible for this year's Pulitzer, John Proctor Is The Villain is a better play than both Purpose and Oh Mary, and should win Best Play. "Should win" and "going to win" are two different things, but JPITV deserves it.
That being said, I felt largely indifferent towards Purpose. I didn't dislike it, but it didn't strike me the way that Appropriate did, and it certainly didn't strike me as a Pulitzer-worthy work. BJJ is still one of our best currently working playwrights, but Purpose is not his best and I wish that his Pulitzer had been for one of his better pieces.