Hi,
"Erase entire disk: ${DEVICE}" message in partman-auto may show a 
negative impact on a new user.  I think the first step of a "guided 
partioning" process should describe itself in a more positive or 
charitable way :-)  Anyways, this thought could be found subjective, so 
I haven't converted it to a wishlist bug, before listening your thoughts 
/ feelings on the subject.  Comments?
-- 
roktas