In my opinion WvW has a major inbalance problem. I have noticed that it takes ages to go inside the map but thats not what anoyes me the most. What does however strike me as a big problem is the fact that there is no system to create equil forces. Lets say 1 side comes with huge numbers and fils the map. The other side has no chance to retaliate simply becouse of overflow. I would sugest granting sides that have les people in the field a faster chance to enter. This wil create fair batle instead of being over run by a huge army and only having a few people to devend your own keeps. If it was al up to me i would even ban people after a period of playing WvW to keep the numbers semy equil.
I sencearly hope you wil take this in to censidiration and believe it wil make for more fun and fair gameplay.