Sometimes I think the latest incarnations of Star Wars suffer from too much "world building". For example, I didn't need to see cameo appearances by Dr. Evazan and Ponda Baba in Rogue One, or C-3PO and R2-D2 for that matter. Likewise, I didn't need to see 3PO, R2, Princess Leia, Darth Vader, Lando Calrissian, and/or Ahsoka Tano in Star Wars Rebels. I already know I'm watching a Star Wars program; I don't need to be beat over the head with it.
And while I'm at it, I thought "the blind guy and his thug friend", a.k.a. Chirrut Îmwe and Baze Malbus, were the most interesting characters in Rogue One, particularly Chirrut Îmwe. I wouldn't mind seeing them in their own standalone movie.