I don't see how it's up for debate, but apparently it is. Ady has said he's going back to the 1980 voice, which I agree with, but many feel that since he's a clone, he should sound the same as Jango, who has a Kiwi accent.

But accents aren't genetic, they're learned, and Boba has had a couple decades to shed it. My best friend's mom is from Germany, and has only been living in the US for 20 years. I've known her for 13, and I clearly have heard a difference between her thick 1997 accent and her almost nonexistent 2010 accent. If you're immersed in a different accent for long enough, yours will change.

So I agree with Ady - Boba's voice should go back to its 1980 version. It's also more menacing than Temuera Morrison's badly-read 2004 overdub.