sure, they aren't a charity. but you can't tell me, that the whole workforce is working on an expansion / successor while only a handful of 2d artists and some programmers resemble a skeleton crew for the new "content" we got.
and yeah, i may sound like a spoiled brat demanding content. but blizzard killed the only source of income with the RMAH and didn't come up with another revenue stream, therefore nobody will be paid to generate content. reintroducing scrapped areas / enemies is not enough content.