My understanding of lag in larger WvW battles, is that it is due to skill calculations on the server side. The more characters that are present, the more calculations that need to be done for every AoE ability, not to mention there would also be more abilities used.
My theory is, what if characters were unable to occupy the same physical space? It would prevent characters from stacking onto each other and force them to spread out. This would in turn reduce the amount of characters being factored in each AoE ability.
I have no real idea what is involved in preventing characters from occupying the same physical space, I am guessing some sort of object collision detection calculation (if that is even a thing). If that is the case, would it be possible to use an invisible cylinder that would engulf each player? That way the simple geometry of each character’s cylinder could be used for the object collision calculation, instead of the complex geometry of each character model.
Of course, collision calculations would have to be turned off at waypoints. Also, claiming keeps and whatnot would have to be rethought, as not everyone would be able to fit into the “claiming zone”.
I have no idea how much (if any) of an improvement this would make, or if this would create other technical issues. I just thought I should share the thought.