I dont see it a good idea to keep stuff for people who wants to go and do gymnastics with the OS, because if we keep the sudo parts and the split parts and try to keeps them up to date (generally for the wiki not just kvm wiki) the wiki gonna become a garbage text collection instead of useful updated readable trimmed wiki.
Also since KVM default xml is for user level, and wiki have been changed to explain only user level, then anything else the user want to do then yeah bro enjoy it.. but wiki wont spoon feed that.
I will test Cryfs (GUI called SiriKali) to see if its usable with user level only + KVM VMs. If not then this chapter of the wiki is N/A anymore.