Questions on completion

I have a couple of questions (borderline feature requests)
pertaining to name/email completion in BBDB:

1) AIUI, the user option bbdb-completion-list lists all
   fields it is currently possible to complete. Are there
   any plans to support completing more fields, e.g. the
   mail-name xfield? If not, are there any objections or
   technical obstacles to such a feature?

2) Why does bbdb-complete-mail use a *Completions* buffer
   populated by the display-completion-list function,
   instead of using a higher-level completion command such
   as completing-read or completing-read-multiple? Would it
   be favourable and/or possible to switch to using such an
   interface, or support both?

Thanks,

-- 
Basil