The expansion was so close to perfect. If it wasn’t for the update that Blizzard released where they went from undertuning everything to overtuning it, the expansion would have been perfection. The quests are fun, Hero Talents provide lots of cool options, and the music really makes the areas of Khaz Algar magical and threatening, all at the same time. Admittedly, the story for this expansion could have done with being a little longer, as it felt quite short overall compared to previous expansions. However, there is still time for them to add more in future patches.
Source: N4G PC World of Warcraft: The War Within Review – Better Than Ever [Wccftech]