I'll wipe my tears with my dual WTF from Plane of Sky in Vanilla ;P
The only nerf they might see is getting their damage slightly toned down to the rest of the tanks. They feel a lot better to play vs when BFA launched though for certain. Worst case I'd say wait until 8.2 because it's actually looking decent.
That is my assumption too that it is for your necklace ability. Something like this though is a lot more interesting to work towards with AP than the azerite armor though. Looks like some interesting stuff in the patch curious to see how it is implemented. Still looks like we should get some idea pretty soonish as the PTR is coming up next week and the datamines are reving up their engines.Looks a lot like glyphs/the original Path of the Titans concept they never released.
I also dig that doing high level content can alter the appearance of your skills, but I assume they mean the skills of the neck is gaining, not like your class abilities. But that's cool.