Things that are not working after 5.4.8

None of that is being affected. Even the ability to scale individual nameplates based on threat is not being affected.
Wow Gold eu
Things that are still fine after 5.4.8:
- adding stuff to nameplates (HHtD, PlateBuffs)
- changing the look of nameplates (Tidyplates, Aloft)
- turning nameplates on at the start of combat and off at the end (with proper events)
:
- addons changing the listed default settings during combat, like which nameplate sets are shown
- addons using this loophole to choose what to cast and when