We would like to have a skip paramater for dependency:unpack. This would cause the unpack to be skipped if true. We are currently working around the lack of this with profiles.
The jetspeed plugin has a skip option that we have found some uses for, but jetspeed is not as robust as the dependency plugin (specifically with multi-module builds). We would prefer to use the core modules anyway.
Here is a link to the jetspeed configuration page: