06-05-2014, 08:49 PM
I think Trubel is being brought in as a Season 4 regular to relieve David Giuntoli of draining fight sequences (read somewhere that he is "exhausted"). Personally I'd be totally ok -- no, much happier! -- with a season that explores the suspense and mystery aspects of the larger plot, has Nick working sans Grimm powers for a while with his gang, and does not have a new Grimm enter to throw punches for him.