I have a 60 on Whitemane and on a medium population server.
If layering is turned on in Whitemane it is completely unfair to not allow players to transfer to Whitemane. With layering on Whitemane is the superior server by far. It is so much easier to find a group / pug a raid / or buy items off the auction house on a full server with layers.
Additionally, battlegrounds are interconnected. I can not find a premade on my med pop. On Whitemane it’s easy.
The only reason to play on a medium population server is to avoid the queue.
We can not have it both ways. I like Whitemane with layers. Do it! But then do not lock out characters who would like to play on a full server with layers enabled.