Thanks for posting this screenshot so that I might point out a thing or two and use it for reference. First of all, I am liking nUI6 much more than I expected.
My "main" is a warlock now (demo), who uses demonic fury. Our bar fills so the little bar with green dots is not very useful for our spec, but as pointed out earlier, it is covered with the casting bar.
My second annoyance is the inability to control the HUD. I sorely miss being able to change it to my liking which I'm sure will be implemented soon.....please....soon.
Mostly importantly, in LFR on the Stone Guards one of the 3 becomes "active". Typically (nUI5) there is a bar approximately where the green dots and cast bar is currently that fills with the appropiate color for the active guard (purple for Amethyst, blue for Cobalt, etc.) which changes as the fight progresses. Yesterday when I was in LFR that bar did not appear.
I was at a complete disadvantage the entire fight taking additional time to determine which guard was active. That is much needed resource,
especially in normal mode raids.
Oh, I almost forgot, where is the bag bar in 6?