There are tens of other items one can do, see http://libguestfs.org/virt-sysprep.1.html#operations for example.
*** Bug 1303811 has been marked as a duplicate of this bug. ***
Assigning to Megan for review.
The changes for this bug for 3.5 and 3.6 are now complete and available at: 3.5 https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.5/html-single/Administration_Guide/index.html#sect-Sealing_a_Linux_Virtual_Machine_for_Deployment_as_a_Template 3.6 https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.6/html-single/Virtual_Machine_Management_Guide/index.html#sect-Sealing_a_Linux_Virtual_Machine_for_Deployment_as_a_Template
The changes for this bug for 4.0 Beta are now complete and available at: https://access.redhat.com/documentation/en/red-hat-virtualization/4.0-beta/virtual-machine-management-guide/chapter-7-templates