1. World sizes are based on WvW play hours and players. People who do not play WvW, or are guests, do not factor into the population size of a server. If a world is locked, it is because it has a larger population than our “Full” threshold.
2. Yes and no. We look at timezone participation but timezone participation is hard to balance because people who play at certain times tend to all gravitate towards the same worlds so they can play with a lot of people. There are not enough off-hour worlds that we could link to create 24-hour coverage for every world. It just is not possible with our current world populations.
3. Yes, high population servers are usually the benchmark for when we link worlds. For example, if Blackgate has 10 players and it’s the highest populated server, then we try to link worlds so their populations are also around 10. We can’t be totally precise so sometimes worlds might end up with 12 or 9 but we try to get as close as possible.