Lucas really did ruin Boba with Episode II. Now I know that every appearance he'll have in any movie or show or from now is going to remind me that he's just some lame clone, and because he's such a hugely popular character, you know he'll be back as often as they can manage, and that means I'm going to have to put up with Daniel Logan's voice instead of someone doing a Jason Wingreen impression (and that's another damn thing, if the guy was cloned from Temeura Morrison, why is Daniel Logan always being looked at to be Boba Fett? He looks and sounds nothing like Temeura, obviously, because he's not a clone. Ugh.)
I would say he's still technically a Mandalorian, though, because he's Jango, and Jango is Mandalorian. And beyond that, in EU terms, Mandalorian is more of a culture than a race or people, so as long as he was brought up like a Mandalorian, he is.
Darth Maul should never have been killed in the first place. After the super hype machine of TPM plastered his visage on everything, he should have been the main villain of the Prequels. I know this point has been run into the ground over and over, but it's true; after three movies, people would be fine with him being dead for good, but since he was only in TPM for like ten minutes total, people got the Boba Fett Syndrome with him and he had to be brought back by Lucas because he's can never commit to killing a character that becomes popular.
Thankfully, Dave Filoni is making it all bearable so far and it's not as incredibly stupid as it could be, since Dave actually gives a shit about Star Wars.