I'm on Chaos DC (Phantom) it gets busy at peak times but compared to light DC is generally much more quiet, especially outside peak times. Some other Chaos world's tend to be more active at times even than my world. But I do a lot of content solo and am a newer player so there's stuff to do still (friends don't play this and the one's I've made on here are rarely online).

I heard they split Europe into 2 data centers before I started playing? seems maybe that thinned it out too much in the end.