LOL, well, if you look at the way tools like add2bind or add2alias work, they basically re-define a bind or alias completely. The fact that it happens to be what it was before, plus a given addition, is what makes it convenient. It's likely that this wasn't one of the originally intended uses for these commands, so consider it a workaround.
Explain your idea about dynamic config?
Explain your idea about dynamic config?