This show recanonizes the Star Wars Legends portrayal of the Sand People/Tusken Raiders. Rather than showing the Tuskens as mindless savages as they were invariably portrayed in the films, the series shows them as still ruthless, but also capable of being reasoned with, and willing to let people cross their land so long as they ask permission and pay a fair price. The Season 2 premiere goes further, with the Sand People tribe bordering Mos Pelga agreeing that, in exchange for the offworlders' help slaying a krayt dragon raiding them both, they will keep the peace with them for as long as the Mos Pelgans do the same.
Chapter 11 has Bo-Katan and the Nite Owls explain why Din Djarin and his "covert" behave so differently from previous portrayals of Mandalorians. His group is known as "The Children of the Watch", religious fundamentalists who seek to bring Mandalorians back to their ancient values. Bo-Katan relates that the Watch broke away from Mandalorian society in order to do this, while other clans (like hers) believe such "ancient" traditions no longer apply.
Chapter 12, "The Siege," seemingly gives more context towards Palpatine's resurrection, as the episode heavily implies that Moff Gideon is working towards this goal via using The Child's DNA (courtesy of bodies in bacta tanks that appear to be, and have the leitmotif of, Snoke).
Chapter 13, "The Jedi," revealed that those with force sensitive gifts who aren't trained simply lose the ability over time, explaining why more emotionally unstable force wielders are refused training when giving them said training seems to be the lesser of two evils.
One criticism of the Prequel Trilogy was how Obi-Wan essentially took on Anakin as a student despite having barely completed his own training as a Padawan, thus making him a rather inexperienced teacher. When faced with a similar situation in Chapter 13, Ahsoka outright refuses to train Grogu because she senses of the darkness within him, and knows she doesn't have enough wisdom to steer him on the right path.
Chapter 14 does quite a few wonders for Boba Fett:
The episode applies a great deal of his personality from Legends by showing he does have a sense of honor, and will always hold up his end of the bargain.
Moreover, after Star Wars: The Clone Wars left his (and by extent, his father Jango's) status as true Mandalorians ambiguous, Boba provides proof that Jango was a foundling, much in the same way Din was, proving that Prime Minister Almec was lying and that the Fetts were of Mandalore.
Perhaps the biggest contribution was to his reputation, which was largely based on his status as a Memetic Badass outside of the series. He not only effortlessly destroys an army of Imperial Troopers without his armor, him reclaiming his suit shows precisely why he's the most feared of all bounty hunters.
On another note, the show got some serious flack for killing off Fennec Shand, who had proved to be very popular with audiences. This episode not only brings her backnote A shot of her being approached by an offscreen Boba in her debut episode ties into this, but in the following weeks, confirmed she would be appearing in not just one, but two major series after: Star Wars: The Bad Batch and The Book of Boba Fett.
Migs Mayfeld's credentials as a former Imperial sharpshooter were mocked both in-universe and out in his appearance in Season 1, with Din stating "that's not saying much" when learning that the man was an "Imperial sharpshooter" and viewers pointing out that if Mayfeld was such a good shot, he wouldn't need to spam fire with a trio of blasters. In Chapter 15, he nails the open hatch of a rhydonium truck, from a few hundred meters, out the back of a moving spaceship, with a Tusken cycler rifle that is decidedly not state-of-the-art; even Fennec Shand and Cara Dune are impressed.
There was a historically infamous fandom controversy in how Luke Skywalker killed millions of Imperials by destroying the first Death Star and never showed any remorse for it or faced any charges or social implications. This led to many debates and memes whether Luke Skywalker is a sociopath given many, manyLegends and canon media explore various Imperials as sympathetic or pitiable human beings. Chapter 16 addresses the matter in a darkly comedic way with an outlandish Empire loyalist ranting at Cara Dune over the Rebel Alliance being mass murderers over the Death Stars, while mocking her over Alderaan's destruction and subsequent billions of civilian deaths that necessitated the Death Star's destruction, to begin with.
Chapter 16 also manages to really up the ante by featuring the appearance of Luke Skywalker himself in his traditional role as the Ideal Hero, after his depiction in The Last Jedi proved to be highly divisive. They even managed to get Mark Hamill to reprise the role, and had him bring R2-D2 along for good measure.
Chapter 19 does a great deal to fill in the inter-trilogy gaps after one of the biggest criticisms of the Sequel Trilogy was how the New Republic was depicted as having no meaningful characterization, and being utterly ineffectual before promptly being destroyed by the First Order from out of nowhere, effectively doing a retread of the Original Trilogy. Here, the New Republic is significantly fleshed out as being almost as authoritarian as the Empire was, filled with greedy and corrupt nobles who turned their backs on the poor as well as a general refusal to properly or humanely deradicalize the ex-Imperial remnants, in effect sowing the seeds of its own destruction through callous incompetence. Chapter 21 builds on this further by showing they're not taking any possible threat seriously, setting the stage for their own downfall years later.
