Dangerous Incorporated said:
Changing Bobba's voice back to the original voice throws out the continuity which is the whole point of Ady doing his revist. Maybe I'll myself that Bobba had a cold or a sore throat when tracking down Han!!

You make the shallow assumption that accent is wholly genetic.

Not even close.

Boba and Jango had different, unique experiences. After approx. 26 years of NOT hanging around his father, I'm certain his voice would sound different from his father (when he was Boba's age).