Episode VIII director Rian Johnson has a terrific track record. His Breaking Bad episode "Ozymandias" is one of the best in the show, Brick is a unique low-budget action movie, and Looper is one of the best time-travel movies ever made. Johnson has a way of working within genre fare while adding his own unique twist; he's adept at making movies that aren't just fluff popcorn blockbusters, but are still entertaining as hell. He trusts that the audience is smart enough to follow his lead.
As much as we love Star Wars, the franchise is trapped in its own success. The last two movies have been great, but not exactly innovative. That's why we need someone like Johnson to come and shake things up, in terms of style as well as writing. Expect excellent (yet restrained) action scenes, fascinating world-building, dark humor, and—most importantly—moral ambiguity.
Johnson also has history on his side. The second Star Wars film, The Empire Strikes Back, earned widespread acclaim partly because creator George Lucas chose Irvin Kershner to direct. Kershner was able to come to the franchise with fresh eyes and a unique artistic vision. Combining an established, fascinating universe with an outside perspective created the best film in the franchise—and history could be repeating itself now. The Force Awakens introduced us to the world of the sequels, and now Johnson will add a new set of ideas, taking the franchise in a unique direction. This is his chance to make the next Empire Strikes Back. In Rian we trust.