Why were Plasma Torpedoes added to the Battlecruiser when the Banshee has virtually the same attack?
The Battlecruiser no longer has Plasma Torpedoes that hit ground. Instead, they can be equipped with a Missile Barrage which will be an air-to-air area of effect attack ability. This ability will make the Battlecruiser even more effective against lightly armored air units, as the attack also gets additional damage points versus light armored units. In SC: BW we have terrain bonuses for units, for example standing behind a tree or being on higher ground while shot from lower. Are you keeping or maybe even improving such this feature and what happens with large units that are more massive (Thor) or simply larger (Colossus) than a tree or even a cliff? Terrain bonuses are no longer present in StarCraft II. Instead, line of sight will be vastly more important. For instance, units firing from a higher ground will not be able to be seen by ground units without line of sight vision, and thus the ground units will not be able to fire back.