We need a time skip just to give Azeroth some peace and quiet.
How long has it been since the opening of the Dark Portal? 35 years? In those 35 years Azeroth has had the first, second and third wars, a scourge invasion, a demon invasion, another scourge invasion with the war on the Lich King, A Cataclysm that destroyed and changed most of the world, The Alliance + Horde war, the iron Horde invasion, Another demon invasion, the war on the Draenei homeworld, Azeroth getting stabbed by a giant sword, ANOTHER horde v alliance war, and lastly an old god attack.
What 30 years in our history has thas this much conflict? lol. Azeroth might need a break. :P