Guild Wars 2

Does ArenaNet have any plans on increasing world capacity anytime soon?

Purely speculation, but I’d say no.

I suspect they’re constantly lowering the threshold that makes servers report as “full” in order to distribute the population between them evenly. The worlds are very clearly capable of handling a higher capacity than we’re currently seeing, so hardware limitations or whatever isn’t the issue. This is just a deliberate attempt to force the populations to balance.