The two-part “Ghosts of Geonosis” obviously had a big tie-in to Rogue One via the Rebels introduction of Saw Gerrera (with Forest Whitaker voicing him no less), but it also managed to be another installment with cool ties to multiple parts of Star Wars lore. Geonosis of course was introduced in Attack of the Clones and Saw himself in The Clone Wars, allowing this episode to touch upon both of those pieces of history in fun ways.
Though let me get out of the way that Klik-Klak is a very silly name and hearing it over and over didn’t help. Couldn’t Ezra have just gone with Klik? Klik works! And it doesn’t sound so childish.