While that is a good idea and would allow for a more flexible series of Item creation Feats that would allow Wizards to cater to the Nobles and other rich folk who don't want their magical trinkets to clash with their outfits because Looking good is better then Feeling good (thanks Billy Crystal).
However, I was more referring to adding an addtional slot to the Limits on Magical Items Worn as seen in the DMG pg 176. It would be a single slot that would add one piece of misc jewlery that could be placed in many different areas. However, each person would be limited to just one.