Right now the breadcrumb for the Admin profile is
Wiki Home » XWiki Space » Data types » XWiki User Class » Admin
This could be simplified by having a space called "Users" that could be the parent for all user accounts, have
xwiki:Users.Admin instead of xwiki:XWiki.Admin and with the breadcrumb
Wiki Home » Users » Admin
From what I understood from Thomas M this change could be very hard to make so another solution is to change the parent of users pages to the "User Directory" and letting the structure the way it is.
Wiki Home » User Directory » Admin