I was wondering if it was possible to have variable aggro distances for mobs. For example, if you have a group of mobs that is out hunting supers or just causing general mayhem, then maybe their aggro is set to 50 yards, but if they are suppose to be breaking into a car or a building, or even the look out for a bank robbery, maybe it is set to 25 yards, so they don't draw attention to themselves so easily.
Along with that, will aggro be triggered by line of sight, or just distance from the mobs. For example, will you trigger aggro if you are within their aggro range, but around the corner of the building so they can't see you? I really can't remember if COH was line of sight or not, but it could make things a bit more interesting. Especially if you can crouch behind something in a mission to try and sneak past a group of mobs instead of charging in and bashing heads.