Decide for yourself
Cataclysm:
- Alliance lost every important battle in every zone
- Alliance zones given to the Horde
- Orgrimmar gets a complete revamp and looks great, Stormwind gets its park destroyed
- Thrall as the main character
- Garrosh as the driving force behind the faction war
- 4.1 Vol'jin in the spotlight in the trailer, takes up the fight against the troll tribes
- 4.2 Thrall in the spotlight in the trailer (for whatever reason, because he had little to do with the battle on Mount Hyjal against Ragnaros)
- 4.3 Thrall saves the day
MoP:
- Alliance loses Theramore
- story focuses heavily on the Horde storyline and on Horde characters, Alliance does almost nothing
- as far as we can tell no satisfying ending of the conflict for the Alliance, Varian lets the Horde choose another warchief and then the Alliance walks away