I agree with [MENTION=17829]Roboartist[/MENTION], they would see the powers of twinks for themselves.
In addition, given the fact that BoAs will now be purchasable with gold in 6.1, practically anyone will be able to compete versus a twink on some kind of equal ground.
It was understandable that when Blizzard originally segregated the two brackets, the gear difference between a twink and a typical leveler was immense. Now, with scaling, easy access to BoAs and a higher health base, any player could compete against a twink.
In other words, MERGE THEM TOGETHER!