They have said a few times that rated BGs will require a full team queuing up, if you queue individually you won't get into the rated BGs. AV/IOC are also changing to 25 man BGs from 40. To be honest I don't see this staying in very long, too many people are going to want to queue as 1-5 people and still "get points" if they win. But the problem will be that organized 25 man teams will just faceroll through pugs, and you only rank up for wins.
Link for them saying they require a full team? I've seen more than one blue post indicating that you still won't be able to que up with more than 5 people.
"Tact is for those that lack the wit for sarcasm."
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