Ahsoka
Man, as a fan of Clone Wars and Rebels, it's kinda shocking how dull this was. Grand Admiral Thrawn is not anywhere near as intimidating as one should expect after reading the Star Wars Legends: Heir to the Empire trilogy. Shoddy direction and uninteresting lightsaber battles make for a really boring experience, Dave Filoni is an excellent writer and Star Wars lore connoisseur but he is not fit for live action directing.
Natasha Liu Bordizzo as Sabine Wren is the absolute saving grace of this or else I wouldn't have cared for a single character.