Not everyone enjoy Arena and RBGs allow for more class/spec diversity.
rbg's are so racist towards melee atm you gotta be kidding me.
also you are saying you can fit more specs into 10 people team than you can into 3 people team? whaaaaa...
in 3 ppl enviroment 1 person accounts for 33% of the perfomance in an ideal situation
in 10 ppl enviroment 1 person accounts for 10% of the performance in an ideal situation, ofc you can carry 1 baddie around.