I think they said they wanted to do cross-DC somewhere, right? That big brain drawing Yoshi-P had to do on a piece of parchment? I'd imagine it's something we'll get eventually, and I can definitely see the technical hurdles involved. I imagine, some day, next expansion or the one after that, we'll at least get to buddy up with players on datacentres in the same region.

I will say I don't think the worlds are underpopulated at all. It's hard because some worlds have a different distribution of levelling players VS max players, so a lot of our strongest worlds are actually pretty quiet between content releases.