I saw the zones in beta, but walking around in The broken Isles I keep stopping to take screenshots and to enjoy the view.
The Graphics are better then the old zones on high settings but besides that the art feels so beautiful and diverse over the Isles.
I really liked the General theme of the wod and mop zones but I feel in the legion zones the scenery changes way more often, which make the zones feel bigger then they are IMO.
Maybe I will get bored of them eventually but for now these are the best looking zones they ever created IMO, and Suramar is the most real looking city they ever created, but I only got to see Suramar a bit.
I really look forward to exploring Suramar and raiding EM and NH, they seem to be on par with the zones beauty.
The leveling is really good but in wod the leveling was just as good IMO. What legion lvling has over wod is the art.