Did a /sea all on Asura a couple of days ago around 4pm est and there was around 1.8k people online. I'd say that's pretty good for being EU prime. Maybe a select few servers have lower numbers on average but I really don't think it's anywhere near as bad as it was on Pandemonium before the merge, with 700ish people online at that time. And that's well over 2 years ago already since Pandemonium merged with Asura.