No one really said it was lacking content. Fun, compelling and engaging content is what it is lacking . That and a good chunk of the content renders a good chunk of the other available content useless or irrelevant.
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ON a side note, with ATVI not doing well , and is actually looking weaker and worse then they did in Feb , I would expect a lot more budget cuts, shuffling of Devs and Blizzard scrambling to get a new IP out ASAP. I think the turmoil in ATVI is really going to impact future content for WOW , if not hasten the death of Retail and they just keep Classic going