Ack no no... My earlier compliment.. came off extremely blunt, I apologize, I'm in no way saying those functions are the "bread and butter" of a game, but superfluous..
It's hard to explain my desire for either of those functions, because my game uses both heavily (Players choose the color of skin and clothing, hair, eyes etc at runtime- and collisions to detect if all movable joints are within a players 'bounding box', and attached to each other to form a body, although the bounding box actually does the collisions.)
I can make every body part, hair, clothing accessories,eyes, etc in every color, and I can always switch to single sprite animation rather than bone based animation, although a collision rectangle wouldn't do much to the end result.