It would be great if you implemented Ghost Requests...I used a system ages ago where a type of ticket "Ghosts" could be raised by administrators to test the rules around how tickets were managed. These were always invisible to normal users, reports, SLA's and only visible to the system and system admin but did help with making sure the rules you had in place for assignment, SLA etc. were being applied without impacting BAU tickets.
Although we do alot of our tests in our test environment we still have the need sometimes to see how our Live environment deals with things. The main benefit is for administration and diagnostics but just an idea.