This is a screenshot of my UI. It is not special in any way. Here is a list of my mods. I hope this helps!!!!
So, here is my UI. It is pretty basic. I don't use that many addons that change the playstyle of the game, due to patch issues. I know most addons anymore tend to have survived long enough that we know which ones are going to stay around (and be updated early before patches, but still).
Here is a basic rundown of the addons I use:
Nurfed (unit frames and available action bars)
EventHorizon (replaced DotTimers)
(My own mod), that hooks SCT to track water shield duration/fading
Its a pretty minimalitic UI comparatively, but allows me to access everything pretty quickly and I have almost no issues when patch day arives, and I can play uninhibited if every mod breaks.