What's the point? How about solving 90% of the problem with
.000001% of the cost?
Changing the numbering system wouldn't just be difficult. It will just not happen. You can tray, but you will fail. At which point you will have only helped preserving the current system of AD/BC.
By moving to the CE system you stop using a religious term (which is the problem because to some is usign a fictitious character for a science reference) while continuing to use an arbitrary zeroing point, which is not a problem since unless you are able to count from the big bang or use a moving system that's based on the present time (both quite impractical), all references are arbitrary, and chosing the arbitrary (and inaccurate) date of the alleged birth of some person is as good as choosing anything else.
Fundamentalists like you that dismiss battles that can be won in favor of ones that can't are the reason why fairy tales still rule society today. Pick your battles and you may win sometimes.