Thank you for clearing that up about the replacement. After some discussion it was pointed out that the extra field would need to be added to multiple forms and even after it was set and could be pulled from AD, the original First name/Last name would be filled in as the combo name for Requested by, Reported By (log_agent), Assigned to, etc.
We will most likely not be moving forward with this change and will direct the IT groups to make procedural changes.