This part…
… is the part that I think refers to exploiting pathing. I don’t actually think they’re targetting boosting here. Quite frankly, I don’t think that’s a problem. It’s the folks who have found ways to to exploit game mechanics, such as pathing, to far exceed what Blizzard considers normal amounts of experience.
Frost mages kiting groups in SM and mass AoE’ing them down is probably not what they’re after here.
I can’t say for certain though, this is just how I see it 