Personally, I think the people who want this feature are those who don't know entirely how the whole multi-server system works. I mean the cid's are there for a good reason, they're supposed to be unique and fixed, being able to change them defeats its entire purpose, and would mess up other scripts as they couldn't rely anymore on the fixedness of them. There's nothing that can't be done for multi-server scripting with the current implementation, all it takes is to learn how, being able to change the cid's isn't going to help with that.

(PS not directed at you)