So yeah it seems you definitely didn’t read the blue post so I’ll help clear some things up with direct quotes from Aggrend, the WoW Classic Game Producer who made the post.
You say “The point I was making is that a temporary increase in server capacity based on 5 layers of players is a solid path forward to take the edge of the over crowded servers”
Aggrend says “We’ll start with the easiest and most clearcut statement to make. The mega-realms in US and EU that are queuing are completely full. This statement is the absolute state of things, and there is no additional capacity we can add to these realms to allow more players on, or to reduce queues.”
You say “Its 100% possible to increase the server cap AND the layers for a time, Blizzard did it before, and they can do it again.”
Aggrend says “One common suggestion we get is to “just add more layers”, and it’s very important to understand that layers do not add in any way to capacity. Layers are a Classic-specific solution to alleviate congestion in the game world in densely populated areas.”
More information can be found at the link below, I highly encourage you to educate yourself.