When creating a homebrew or custom origin it would be nice to add some of the classifications to the origin, like mutant, high-tech, magic, and chaos. This will allow for creating new origins that can have access to restricted traits and powers.
This might be useful for something like special training variant as well. Either allowing you to have specific traits added by default or even possibly a limited selection of powers like other origins while still limiting access to other powers. Much like the vampire origin.