I'm not sure how to properly explain this, so I'm just gonna give an example: In the temple of selune where Raghzlin is, I was standing at bottom level, so the level where the throne is. during the fight against him, I wanted to shoot magic missile up all the way to a goblin that was standing on the beams above the room. Well, there is no button that allows me to adjust the camera so that it shows me this upper level with the beams, where the goblin was standing, so I could not shoot him.
A button that would allow me to adjust the camera up or down, instead of just left and right, would be amazing for a game that has so much (awesome) verticality.