($Users) view and Lastname only question

The formula for the users column contains a section for handling person documents with this formula:

Type = “Person”;

  FirstName

  : LastName

  : FullName

  : @Name([CN]; dn)

  : ShortName

  : @Soundex(LastName)

  : (Lastname + " " + FirstName + " " + MiddleInitial)

  : @Name([Abbreviate]; FullName)

  : AltFullName

  : @Name([Abbreviate]; AltFullName)

  : @Name([CN];AltFullName)

  : InternetAddress

 : NetUserName;

I would like to remove the Lastname entry that is flying solo and change the formula to this:

Type = “Person”;

  FirstName

  : FullName

  : @Name([CN]; dn)

  : ShortName

  : (Lastname + " " + FirstName + " " + MiddleInitial)

  : @Name([Abbreviate]; FullName)

  : AltFullName

  : @Name([Abbreviate]; AltFullName)

  : @Name([CN];AltFullName)

  : InternetAddress

  : NetUserName;

Can anyone think of what this might effect? In testing, address book lookups & email all work fine.

Thanks, Matt