Most people have a set of standards for these fields that follow a set logic that could be written in a formula. For example, if preferred name not blank, preferred name, else first name; with the addition of if spouse exists and spouse preferred name not blank, use

People should be able to automate these fields so they dynamically fill, and then anything outside of that logic you direct users to use "editable." When you create a new donor, the system has all of the information it needs to automatically fill the addressee and salutation, there's just nowhere for an admin to tell it the logic to follow. This is a huge missed opportunity to make things efficient and cut down on errors.