Explain to me how to effectively powerlevel in WoW (post-vanilla). Because the most efficient strategy I've managed come up with for it is to grind out the quests. Having a friend run Scarlet Monastery for me over and over doesn't produce better results, especially since it's limited to five times per hour.
I'm just saying, my observation has been that a system where "Higher level player killing your mob = lower exp for you" does kind of impact the ability to effectively PL.