I stopped watching Clone Wars last year (is it a bad sign when they can't keep politics out of kid's show?). But I actually liked the Mandalorian story line. It acknowleged that back in the day (1980) Fett wore "Mandalorian armor." He had WOOKIE SCALPS and supposedly the Mandalorians HUNTED JEDI. Never said HE was Mandalorian.
Now I don't know what EU crap has come up about Fett and his kin, but Clone Wars did a nice nod to what was old-school Star Wars folk lore. And I believe that the show runners said as much.
Kind of like how for all of it's other problems it was actually kind of cool that "Sith" found it's way back into Star Wars. When I was a kid you hardly ever said "Darth Vader" without finishing in ominous undertones "DARK LORD OF THE SITH". Then he somehow became Luke's dad and that all went to hell.
Now if someone can make sense of the line "helped the Empire hunt down and destroy the Jedi Knights". Somehow I never got "killed a room full of kids while the stormtroopers slaughtered all of the grown ups" from that.