So can someone help me understand how Legion is going to affect boxers please?

I heard class halls will make most of the toons have to run certain quests separately, not in groups I think. And you have to do the class halls quests to get your artifacts right?

What about leveling? Will boxing work the same as now for standard world questing?

I know gathering ill be a nice change since your whole team can access the same nodes, multiplying your gathering numbers.

Anything else that will affect us?