If there were some form of incentive to queue as a group on horde side. You wouldn't get totally dominated on every queue.
Right now the only benefits to queuing as 10 are:
- Longer queue times
- 100% chance of facing an enemy premade
- Fighting the same players repeatedly for no honor
- Making it easier for the solo queue players you compete with
Those are some quality benefits. I'm sure nobody will say 'fuck that' and solo queue instead.
