High amount of players stretched out across multiple nodes.
Stress test when everyone was in the same area? I think it peaked at just above 1k players.
IF they'd had seen the 2-3k people in one node that we are seeing now then, maybe they'd have had a better chance at getting a release that would have worked, or at least they would have started working on a solution that makes it so 3k+ people aren't choke pointed into the towns, when they would have known the node with said town cant handle it.
But reality is they probably didn't even expect this many people to get the game. They were looking at game purchases pre launch and were looking at those peak numbers x2 most likely and figured it'd be fine. Reality was what seems like more than x2 whatever that number was though.
So when are people done beating a dead horse, really adding nothing new and just making noise? Its not going to get the problems solved faster.