I would like to see the auto populate group feature in the Domino Directory to be enhanced so that it is not limited to "HomeServer" only, but you can use "freehand" LDAP queries to populate a group according to the field values in a person record ( i.e. (&(ObjectClass=dominoperson) (location=Paris) ) ).
This is a great timesaver when you have to shift loads of persons to new locations or to different departments and your group structure is built on these criterias. Just change the field values in the person record and let Domino do the rest for you.
An example of how this can be done even for non-Domino 8.5 servers can be found here : http://www.eknori.de/2008-06-22/autopopulategroup-if-you-do-not-run-domino-85/