If you were under the impression that Harry Lloyd joining the cast of Legion season 3 as iconic X-men leader Charles Xavier would result in a more straightforward, comic book-faithful storyline, then woo boy I have a giant unexplained pig monster to sell you. (To clarify: Legion season 3 contains a giant pig monster. It is not explained.) The third and final season of Noah Hawley's wild ride through mental illness and mutation is, if anything, more prone to flights of fancy, unorthodox editing, and the occasional random musical number than the two seasons before it. With …