As it stands now, every spell and attack that is in the game has to be associated with a target of some type whether enemy or ally (even PbAOE spells have yourself as a target, technically). What I have always wondered is why there are not spells/attacks that can be cast in an area instead of needing a target to cast on.
For example, take the pre-existing skill meteor storm. Instead of highlighting an enemy to cast this on and then having it rain in that area, why can't we have the player select the skill and and then place a flag on the ground (or minimap) within a specfic amount of distance where the spell will be cast (the same function used to point heroes to an area). The spell will then occur in that area, in this instance, creating a meteor storm where the flag was placed.
Granted that this is mostly related to Elementalsts, but many classes have AOE spells that could function in a similiar way. Imagine being able to cast heal area to an actual area. Or cast spirits in strategic locations without having to run there first. I wouldn't want this mechanic to be universal of course, but some skill types could really benefit from this, I think. And if you don't think it can work with current skills, could it not work with newer skills for a possible new profession?
If anything, I would love to see this mechanic in a future chapter because it begins to bring in the idea of manipulating the terrain and the enemies group movement. I'm sure we've all seen this mechanic in other games as well, and GW seems like a great canidate for this too.