Uh, was that Boba at the very end?
Yes
So, he escaped the Sarlaac, lost his armor in the creature, and has been wandering around Tatooine in street clothes this whole time?
Who's to say?
I think it is! They even brought back the actor who played Jango Fett!
Or some other clone.
Yes. Boba Fetts name appears in the credits for the episode on IMDB.
Yes. They shit the bed by resurrecting another dead character.