Ok many of the GW2 community are here to WvW almost exclusively. Balance has and probably always will be an issue. I think that instead of just having a hard cap in each WvW map. There needs to be a rolling cap to keep the numbers even. This would greatly balance out the servers because it would stop being just a numbers game. This would also make moving to smaller WvW servers much more attractive and bring balance and parody across the servers.
How it should work. There are multiple options on how exactly to compute the cap at a specific time. Starting with EB it should simply be the smallest server +10. So that would keep all sides within 10 players of each other. which 10 is a big difference but not a crushing difference. So the smallest server does not get overwhelmed. So lets say red has 30, blue has 40, and green has 60 players on the map. With this rolling cap red and blue would be fine, but green would have 20 players in the q, instead of having double the force of red, they would only have 10 more players, keeping all the sides with a real chance.
This would make transferring servers to smaller communities an extremely viable option for a lot of high quality guilds. Because say a guild of 30 went to the smallest WvW populated server. They would be able to be extremely effective because they know that the enemy side could at most bring to bear 40 players against them. which keeps the fight relatively even, and we all know 30 organized will easily wipe 40 pugs.
Now how to compute the cap in the borderland maps is a bit trickier as there are times when one or two sides is empty. so perhaps they will have a hard minimum cap for the home team, and then a rolling cap above that, id say start the hard cap at 20 -30 and then do a rolling cap for anything above that.
I know you are still trying to balance WvW and I think this would greatly achieve that. Its no secret that the NA servers are stacked, primarily BG, JQ, and SOR. For anyone to have a chance they must be on one of those servers because the Q is big and the only way to compete is to keep the Q filled as long as possible. Well if we can get a rolling cap, and avoid 80 vs 20 fights, then there is no longer an incentive to stack on the 3 top servers, because the Q will be outrageous and the numbers advantage gone.
So to sum up, WvW needs a rolling cap to keep the fights close.
Thanks for taking the time to read this