This is from the latest test patch notes:
Looks like Daybreak really wants to make sure that one group will not be holding open a pick zone. Would guess this will probably go live with next patch.
The number of players needed to spin up new pickzones has been lowered. Additionally, when a pickzone has less than 10 players in it, it may lock. Players will be alerted when a pickzone locks and will have 15 minutes to leave the zone before it closes. If players do not leave, they will get ported to the main zone after the time expires.
Looks like Daybreak really wants to make sure that one group will not be holding open a pick zone. Would guess this will probably go live with next patch.