At the moment, each node in pvp has the same symbol at its center, while nodes in pve show the symbol of one of the enemy combatants. You can see the enemies by clicking the node anyway, so that isn’t really informative.
Instead of this, what if the nodes showed the symbol of the environment where the battle takes place? This would have strategic value, since some characters synergize particularly well with certain environmental abilities. Obviously you can figure out which node corresponds to which environment during the course of an event, but a graphical reminder would be nice..