Premade does not equal pug.
Scared to adapt? Quite the opposite. The collective group of 29s on horde currently are too oblivious and stubborn to realize that we are the new meta. You are in fact limiting the meta by encouraging to reduce/refuse to use classes that are currently strong in this patch, and while in moderation (for premade purposes) I think that is a logical idea limiting BMs to one per team etc, you are denying the meta by completely disallowing an entire class/spec that is currently top tier class in the bracket, in other words dis-embracing the current meta. The only class in actuality that I would reason to ban is Feral, and that is actually not really necessary with good communication/team awareness in a 10v10 premade.