[bothersome]

To summarize: Changes need to be made to the following files at the following lines.

Mazzifier.lua around lines 387, 389, 409
Mazzifier_Configs.lua around lines 348, 3382

Replace all lines that contain

SetCVar("UnitNamePlayer","1" or "0")

with the following:

SetCVar("UnitNameFriendlyPlayerName", "1")
SetCVar("UnitNameEnemyPlayerName", "1")
SetCVar("UnitNameEnemyPetName", "1")
SetCVar("UnitNameEnemyCreationName", "1")
SetCVar("UnitNameFriendlyPetName", "1")
SetCVar("UnitNameFriendlyCreationName", "1")

If the number at the end is a 1 in the original UnitNamePlayer line, then use a 1; if it is 0, use a 0.

Use notepad to edit the file. Turn on the status bar in notepad to enable line numbers. Line numbers will change as you add lines. Begin with greatest line to be modified on each file to minimize confusion.

Hopefully, the rest of the fixes are this easy.

Also, in addition to SCL, Damage Meters is not being updated for 2.4. Suggest using Recount as replacement.