The UTC is considering two changes relating to properties for the Unihan database. PRI #225 proposes transforming the data for the kHanyuPinlu field so that it also uses accented pinyin. PRI #226 proposes deprecation of the kCompatibilityVariant field.

For details of these see the PRI pages:

http://www.unicode.org/review/pri225/

http://www.unicode.org/review/pri226/