MOP provided scenarios, flexible raid scaling, pet battles, cross realm raiding. Wod provided enhanced group finder and Garrisons. Features, not new content. Cata provided transmog, lfr and reforging. I might be missing something.
To the OP Wod wasn't rushed. 6 month raid schedule like last expansion. The difference is the sub patches in between were missing meaningful content. 6.2.2 which arrives tomorrow has flying but no meaningful content other than that.