MoP was quite the awesome Expansion - it wasn't only about the Pandaran at all. I really enjoyed the Pandarian Campaign (starting with 5.1), and the whole Legendary Cloak Questline. It was some solid Horde vs Alliance Storytelling, and it was done well. Of course, the Bits about Pandaria itself (basically the whole 5.0 Stuff) was also some solid stuff. Maybe the Monk Class would have worked better if only the Pandaren could be Monks - since they are so heavily leaning on the whole Pandarian Culture. That is the grub IMHO - the whole Culture Theme that is cooked into the Class doesn't fit to any of the other races.
No, that highly depends on the Talents you are choosing. I can play a Build where the Monk will heavily rely on his weapon. And the D3-Monk Animations have a lot of Impact behind them, a lot of Power and you can really feel how his Spear Jab is destroying the Throat of the Demon, just slashing it to mush. Meanwhile, in WoW, the Windwalker just dances around and hits / kicks the Air, while the Enemy health bar barely moves. Looks like a Point Fighting Karate Match for Teens, just tap the Enemy for Points, don't actually go full contact.
It is just visually so lacking. I never have this feeling in D3 with the Monk. Just look any Gameplay Video of D3 Monk.