Maintenance for the week of July 27:
• NA megaservers for maintenance – July 27, 6:00AM EDT (10:00 UTC) -11:00AM EDT (15:00 UTC)
• EU megaservers for maintenance – July 27, 10:00 UTC (6:00AM EDT) - 15:00 UTC (11:00AM EDT)
Freezes seem to be related to Zerg Battles, if you are in a group fighting another group, one group mass freezes (20+ players at the same time) and the other one is fine.
The current performance issues on console are currently being looked into. You can find more information and continue the discussion in this thread. We are closing this discussion.