Remove layering now? Please no. Servers are already 3,500% of what it was during the times of vanilla. If you remove layering this early, it will be like New York City in the middle of rush hour all over Azeroth. I can guarantee they have an agenda to remove layering during phase 2 that will be pushed back.
They also made that video with the mentality that 9 total servers were going to be enough to support the player base.