The packageTemplate.xml applies to the entire site which means you cannot customize it for specific contexts or specific packages.

If you change the default domain path, you may have to enable packages again. If the domain already exists in a context, you won't be prompted to enable packages again.

If the context is using a shared team that isn't extended, the roles from packagedSharedTeamTemplate.xml will be used and the roles from packageTeam.xml will be ignored.