Kallus proclaiming his fierce loyalty to the Empire while confronting Han and preparing to arrest him for desertion is a lot harder to take seriously if you've seen Rebels (especially since the issue came out after the show had already concluded). Even more funnier with idea that Kallus and Han probably have met again while working for the Rebel Alliance.
The covers for the first issue of Tales From Vader's Castle showing Kanan and Hera terrified at a green ghost in the background and reaching their arms out the doors like a poster to a cheesyhorror movie from the '40's/'50's.
Memetic Badass: The comic brings Jaxxon, a character who probably has about the same level of infamy as Scrappy-Doo among Legends & Expanded Universe comic fans, back into canon. Except Jaxxon's reputation is benevolent enough that he's only looked down on for being a strange and jarring addition to the Star Wars universe (i.e. a greenBugs Bunnyexpy...in space) rather than being outright obnoxious, which is probably why his return has been treated rather lightly by fans.
Memetic Mutation: After it was revealed that Kallus has met Han and Chewbacca, this prompted jokes among Kallus and Zeb shippers that Kallus thinks Han and Chewie are a couple in the same vein as them.
Periphery Demographic: Despite being targeted towards children, older fans have found the comics to be rather entertaining, especially because of the Continuity Cavalcade (also helped in that writers from other Star Wars works are writers on this series), Awesome Art, and A Day in the Limelight/Day in the Life format, which evokes the nostalgia of Saturday morning cartoons while not making it bizarre or out of place for current Star Wars standards.
So Okay, It's Average: Fans that don't like the comics agree that the loose canon of the comic makes the series too comical ala the Lego adaptations or don't think the format of the characters' everyday lives fits Star Wars to be considered canon in their eyes.
The Ewok story is about the Ewoks being creepily possessed, an enemy species abducting Ewoks to sacrifice them to a predator, and the story ends with the main protagonist Ewok staying behind as the sacrifice.
Hudd gets found by Vader, and XM-G3 is destroyed while fighting the Inquisitor Troopers. At the end, Lina, Crater, and Skritt barely escape, and no, they don't get to rescue or recover their lost teammates. Hudd and XM are gone.