TBH I perfectly understand why such a one time boost is there for BC. When classic launched, it was about the classic content. When BC launches, its about BC content. The classic world is useless and dead in that part of wow. If people want to experience that, theres classic servers for that.
People wont log into BC thinking "oh wow cant wait to play classic leveling", they are there for BC.
Why people farm classic over and over at this point, I dont understand. Theres really no need in order to stay competetive in BC. Besides, thats a player choice to keep farming in classic just for some kind of advantage in BC.
For most people this wont mean jack shit. If anything, those who boosts miss out on alot of cool zones in classic world