This is what is missing from Retail, crz and sharding have killed this social aspect of WoW and it’s why i no longer play retail.
On topic;
I was on the PvE realm the was listed on top(i don’t remember the number), it was medium population and i didn’t mind waiting for mobs to spawn in the Orc zone. Was a bit slow going but i didn’t careand i hope Blizzard doesn’t cave to the current generation and layer the crap out of classic as it’s what has made WoW the past few years crap with crz and sharding.
Layering will kill the classic feel, the community feel. It was so nice to have people around to group up with, to talk to from the server you play on.
I also noticed that near the zone boarders of Durotar and Barrens there was massive lag with loot and combat.