Well I wish someone on the development team would go back and play Diablo II because as good as Diablo II was, Diablo III is that bad. Mind numbingly boring is the best description of III I can think of. The loot drop tables are so borked it is a tragedy. In 100's of hours of gameplay never got one set item or legendary item, NOT one.
Diablo III is so broken I don't think a expansion can fix it.