Photo-Illustration: Vulture; Photos: Getty Images (Rosalind O’Connor/NBC, Taylor Hill, Samantha Burkardt/SXSW Conference & Festival) Lorne Michaels promised big changes at Saturday Night Live ahead of season 51’s premiere, and the creator and executive producer was evidently not bluffing. Following last week’s news that the sketch show is parting ways with cast members Devon Walker, Emil Wakim, Michael Longfellow, and Heidi Gardner , NBC has now announced five cast additions for the upcoming