I don't agree with the bolded. Juggs are pretty strong in huttball. Assassins might be the single strongest class in huttball. But marauders are good only when predation is up and Vanguards are the single worst class in that warzone. They've got a pull every 45 seconds and a whole lot of nothing else to contribute.
All ranged classes have a serious advantage over melee in huttball--except assassins. Juggs are about on par with some of the ranged.
You're simply playing mara wrong.