Out of curiosity, what do you think a subscription traditionally pays for in an MMO?
A $50 expansion obviously includes all that you just mentioned, but the whole fundamental point of paying a subscription is to receive updated content. This game was always expensive, but now it is even more expensive for considerably less content. That is what is annoying people.
But yeah, the knee jerk response "well don't pay the subscription then" has actually started taking very noticeable effect, and Azeroth is deader than ever because of it.
This is EXACTLY what Blizzard are doing now. The profit gained from minimal developer effort and full price expansion prices obviously now outweighs maintaining a happy subscriber community. It certainly seems that the sub fee only exists to squeeze the final drips of cash from the remaining fan base that are willing to pay for it.I'm pretty sure they actually expect you to unsub and then come back when there's content again.