To play devil's advocate a little, I often see complaints about being unable to solo-queue for rated BGs, but rarely anyone addressing the problems that causes. If no other changes are made than just allowing solo-queues...what's the difference between a Rated BG and a normal one? Nothing. It also comes with the same problems of AFKers, honor farmers and whatever else. (At least RBG doesn't force you to have the exact same team every time...though that's small consolation.)

Rating solo performance in a battleground is extremely difficult. How do you rate the contribution of the guy who's guarding the Mine? It's a valuable service to the team, but doesn't show up on the scoreboard. How about the guy who tracks down the flag carrier in WSG, takes out his guards, but someone else shows up to get the KB and cap on the flag. According to the scoreboard, this second guy is more valuable than the first when he's actually not. But then again, what if that was the plan of the two people all along? One distracts, the other accomplishes. There are tons of other examples, but it all boils down to this:

If you want solo queues for Rated Battlegrounds, how do you possibly "rate" that? Do you really want to make damage whoring and ignoring objectives any worse?