I enjoyed it too, I think it achieved exactly what it was meant to do.
Whatever one may think about Pandaren, the main scenario was better handled than in previous expansions and the pandaren race was a pretty good factor in it.
I also don't understand in the first article why she said WoW shouldn't implement new systems found in other games.
On the contrary, if the game systems doesn't evolve, it's bound to fade away, since people always get bored of the same old things after a time.
And as for the "modern MMOs", honnestly, be it Tera or SWTOR, quests are still more of the same old things : "Go there", "Kill X creatures", "Loot Y objects". At least WoW implemented since WotLK some interesting mechanics in the questing system.