X-Men: The Last Stand

[roguebanshee]

What the heck was the point of having Angel in this movie?

You could make the connection that was stated above, but there's also another possible (but related) role.

Most mutations/mutants are often categorized as dangerous (Magneto, Xavier, Jean) and/or freakish/grotesque (Toad, Beast), both of which instills caution in the common people. Angel is neither. He's the pretty boy who looks like his religious namesakes. He represents hope and freedom. By rejecting the cure he tries to show that not all mutations are ugly or dangerous or need to be "cured", that his father's zeal to purify the world may not be right.

Angel is the beauty that neither wants to be ugly to fit in nor wants to hide. He's proud of what he is, but he is not zealous or militant. At least that's how I percieve his role in the movie. He's quite different in the comics, but so are most of the characters.

You can of course substitute mutant for various religious or sexual orientations and still make fairly good sense of the X-Men stories, they are, at the core, about being rejected by society and still trying to fit in/making society accept you.