this was clearly written by someone who doesn't fully know what they are talking about and probably didn't pay that much attention to the show. they showed up quickly because At Attin was a legendary lost treasure of the galaxy and they couldn't risk it falling into anyone else's hands. the situation in the Mandalorian was much different while still involving similar themes like invading pirates.

first off i never felt the show fell off for the last few seasons. in fact there was a lot towards the end that i really loved (especially Lily messing with Gloria after Dede died). but ive been thinking for a while the best way back in would be seeing Lily start college while also seeing Haleys kids start school and Alex could maybe even be getting married or starting her own family. Lily was a bit of a genius so it would be fun seeing how she did in school, we didn't get enough of Haleys new family (and i felt the final season messed up by not adding Dylan and her kids to the opening titles), and it would be fun to see Alex frazzled planning a wedding or trying to wrangle her own kids

the mistake wasnt in using the character the way they did it was in revealing that Thrawn was the true villain in the series. if they kept that hidden until just after the defeat of Marrok and focused the ads on him and Baylon Skol it would have been a crazy reveal that would have led fans more into expecting to see Ezra since for some reason he was the one character left out of promotions for the show even after announcing Thrawn and everyone else would be in it (even though his casting was known well before his appearance). but i think all of that speaks much more to the big problem in Star Wars other than toxic fandom which is Disney doesnt handle it nearly as smart as they do Marvel or Disney productions. where they will do their best to hide everything they can about a production before it's release, and they way better too. with Star Wars stuff they are just like heres a couple badly cut ads and some new cheap toys because we introduced new characters youre supposed to love right away. im not saying they dont make toys of the other stuff but i saw a Yord Fandor lightsaber and toys at the store recently and even as one of the few people who loved that show (and even enjoyed that character a lot) forgot totally about his existence until that moment and felt it was unnecessary...because hes barely in the show

according to this show it officially started with the Suicide Squad as the show confirmed the movie as canon to it. so it would seem that both that and Peacemaker are officially both the start to this new DCU and we wont get an explanation as to why or how this works until Peacemaker season 2 where he has promised an answer.