Currently the problem with balancing WvW population is population size is based on both PvE and WvW numbers. Statistics, numbers, any math will be invalid because of that. We have to separate the two variables. Instead of lumping both together, how about creating PvE servers, and WvW servers? Each player will have two home worlds, one for PvE, and one for WvW. With WvW having it’s own identity, low/med/high population actually represents the correct data.
So as an example, I would have GoM as my WvW server, and TC as my PvE server. When I PvE, I would be playing with TC players. And when I WvW, I would be with GoM players.
Sure, it would cost Anet some money to install new servers, and extra maintenance. But on a brighter size, their PvE patch shouldn’t take down WvW for half a day.